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stat962 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/962.png | A school organized a series of activities titled 'The Chinese Dream · Aerospace Love.' Below are the scores (in points) for various events from Classes A and B of Grade Eight. If the final score is determined by the weights of 4:3:3 for the knowledge quiz, speech contest, and panel creation, the class with the higher final score is ____. | Class B | NULL | free_form |
stat963 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/963.png | 7. In an opaque bag, there are several balls that are identical except for their color. During the ball-drawing experiment, the balls are shuffled thoroughly, and one ball is randomly drawn, its color is recorded, and then it is returned to the bag. This process is repeated continuously. The table below represents a set of statistical data from the experiment:
Number of draws (n): | 54 | 99 | 111 | 150 | 200 |
Number of white balls drawn (m): | 34 | 59 | 66 | 90 | 123 |
What is the probability of drawing a white ball? (Result accurate to 0.1) | 0.6 | NULL | free_form |
stat965 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/965.png | A mathematics interest group conducts repeated experiments of 'randomly tossing a thumbtack' and obtains the following data after multiple trials:
Repeated Trials: 10 50 100 500 1000
Instances of the Tack Pointing Up: 5 15 35 200 400
Based on this, estimate the probability that the tack points up in a single random toss. (Result accurate to 0.1) | 0.4 | NULL | free_form |
stat969 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/969.png | The table below records the results of a player shooting at the free-throw line:
Number of shots n 50 100 150 200 250 300
Number of hits m 30 50 80 101 130 160
Frequency of hits m/n 0.60 0.50 0.53 0.51 0.52 0.53
The probability of this player making a shot is approximately ________ (rounded to 0.1). | 0.5 | NULL | free_form |
stat975 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/975.png | The age distribution of 10 students in a math interest group in a certain class is as follows:
Age (years) | 12 | 13 | 14 | 15 |
Number | 1 | 4 | 4 | 1 |
What is the average age of these 10 students? ________. | 13.5 years | NULL | free_form |
stat976 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/976.png | In the Olympic selection trials of the Chinese diving team, the average scores and standard deviations (S) of four athletes, A, B, C, and D, are shown in the table. Since the overall level of the Chinese diving team is high, one athlete should be selected from them to compete. The choice should be ______. | B | NULL | free_form |
stat978 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/978.png | In the Olympic selection trials for the Chinese diving team, the average scores and standard deviation S of four athletes, A, B, C, and D, are shown in the table below. Since the overall level of the Chinese diving team is high, which athlete should be selected for the competition? | B | NULL | free_form |
stat980 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/980.png | In order to understand the water usage of residents in a certain community, a random survey was conducted on 10 households' monthly water consumption. The results are as follows:
Monthly water consumption (t): 10 13 13 14 18
Number of households: 2 3 2 2 1
What is the mode of the monthly water consumption for these 10 households? ______ What is the median? ______ | 13 13.5 | NULL | free_form |
stat982 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/982.png | A basketball player is standing at the free-throw line for fixed-point shooting training. He recorded the number of shots and corresponding successful shots during training, as shown in the table below:
Number of Shots | 10 | 100 | 200 | 300 | 500 | 1000
Successful Shots | 7 | 81 | 160 | 243 | 401 | 800
From the data in the table, it can be concluded that the probability of this player successfully making a shot is ________. (Round the result to two decimal places) | 0.80 | NULL | free_form |
stat987 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/987.png | In the 2023 physical education exam, a certain middle school in Pan County conducted a statistical analysis of the physical education scores of eight students in a particular class and created the following table. Based on the table, the median score of this data set is ___ points. | 45.5 | NULL | free_form |
stat988 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/988.png | In an opaque bag, there are 5 balls of two different colors, red and white. A study group conducts an experiment in which a ball is randomly drawn from the bag, the color is recorded, and then the ball is returned to the bag. This process is repeated multiple times. Below is a set of statistical data from the ongoing activity:
| Number of Draws (m) | 100 | 200 | 500 | 1000 | 2000 | 5000 |
| --------------------- |-----|-----|-----|------|------|------|
| Times White Ball is Drawn (n) | 59 | 116 | 301 | 601 | 1205 | 3008 |
| Frequency of Drawing White Ball \( n/m \) | 0.59 | 0.58 | 0.602 | 0.601 | 0.603 | 0.601 |
Estimate: When m is very large, the frequency of drawing a white ball will approach _____ (accurate to 0.1). | 0.6 | NULL | free_form |
stat990 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/990.png | The forestry department needs to analyze the survival rate of a certain type of sapling transplantation. It recorded the survival conditions of these saplings after transplantation and compiled the following table:
| Number of Saplings | 2000 | 4000 | 6000 | 8000 | 10000 | 12000 |
|---------------------|------|------|------|------|-------|-------|
| Survived Saplings | 1862 | 3487 | 5343 | 7234 | 9103 | 12752 |
| Survival Rate | 0.931 | 0.8718 | 0.8905 | 0.9043 | 0.9103 | 0.9109 |
Based on the table information, the estimated survival probability of this sapling transplantation is ________ (accurate to 0.001). | 0.911 | NULL | free_form |
stat991 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/991.png | Stephen Curry is a professional basketball player in the United States, playing as a point guard for the NBA's Golden State Warriors. The table below shows Curry's free throw training records over a certain period:
Total free throws: 400, 1000, 1600, 2000, 2887
Successful throws: 348, 893, 1432, 1786, 2617
Free throw success rates: 0.87, 0.893, 0.895, 0.893, 0.906
Based on the above data, it can be estimated that the probability of Curry making a successful free throw is ______ (accurate to 0.1). | 0.9 | NULL | free_form |
stat993 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/993.png | Strengthening labor education is an important measure for schools to implement the policy of "five educations in tandem." A small interest group of four students at a certain school conducted surveys to understand the average weekly labor time of their fellow students. The results are shown in the table below:
Surveyor: Wang Xue, Du Juan, Yue Ming, Wang Jing
Sample Size: 10, 15, 20, 100
Average Weekly Labor Time (hours): 3, 2, 1.5, 4
Among these four students, the survey results of _______ are more reliable. | Wang Jing | NULL | free_form |
stat999 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/999.png | A box contains several black and white chess pieces, which are indistinguishable apart from their colors. A student conducts an experiment by repeatedly drawing a piece from the box, recording its color, and then placing it back into the box and mixing thoroughly. The following data is obtained from the experiment: Based on the data in the table, estimate the probability of drawing a black chess piece from the box (accurate to 0.01). | 0.25 | NULL | free_form |
stat1048 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/1048.png | Like geese soaring in arcs and butterflies flitting about, during the jump rope all-around competition, the scores of participants A, B, and C are as shown in the table. When calculating the final score, the scores for single skips, double skips, and single-foot cross skips are weighted in the ratio of 3:4:3. Who among them has the highest final score? (Answer with 'A', 'B', or 'C') | A | NULL | free_form |
stat1059 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/1059.png | On March 12, 2024, China celebrates its 46th Tree Planting Day. This year's theme is 'Together Protect the Earth, Build a Beautiful Future.' The table below shows the survival rates of different batches of poplar trees planted during Tree Planting Day in a certain area. Please estimate the survival rate of poplar trees planted during Tree Planting Day, approximately _______. (Round the result to two decimal places) | 0.97 | NULL | free_form |
stat254 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/254.png | With the arrival of winter, the flu season is in full swing. To effectively prevent the flu, a certain school purchased A, B, C, and D types of moxa sticks for disinfection. Their unit prices are 30 yuan, 25 yuan, 20 yuan, and 15 yuan, respectively. If the ratio of the quantities purchased for each type to the total quantity purchased is shown in the chart, what is the average unit price of the moxa sticks purchased by the school (in yuan)? | 21 | NULL | free_form |
stat312 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/312.png | The first Lao Jia Henan Culture Month event in 2024 was held on January 26, aiming to share and appreciate the profound historical and cultural heritage of Lao Jia Henan. A certain community held an 'I and Henan Culture' speech contest, where the members' speech content, speech effects, and speech skills were scored according to the weights shown in the figure. It is known that a member's three original scores are 96 points for content, 95 points for effects, and 90 points for skills. What is the member's final competition score in points? | 95 | NULL | free_form |
stat422 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/422.png | As shown in the figure, the circuit is well connected, and all components work normally. Two of the switches S1, S2, and S3 are randomly closed. What is the probability that the two small bulbs light up simultaneously?
A. 0
B. 1/2
C. 1/3
D. 1/4 | C | ['0', '1/2', '1/3', '1/4'] | multi_choice |
stat425 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/425.png | As shown in the diagram, Xiao Ming and Xiao Gang each designed a spinning wheel (the sector areas in each spinning wheel are equal). They play the 'Pair Purple' game by spinning each wheel once. If red and blue respectively appear on the two wheels, it indicates they can pair into purple. What is the probability that Xiao Ming pairs into purple? | C | ['1/3', '1/2', '1/6', '2/9'] | multi_choice |
stat445 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/445.png | In an opaque bag, 2 yellow balls, 1 white ball, 1 red ball, and n blue balls are placed. These balls are identical except for their colors. The extracurricular interest group draws one ball at a time, records the color, and then puts it back. They also tally the frequency of blue balls appearing (as shown in the figure). What is the most likely value of n? | C | ['4', '5', '6', '7'] | multi_choice |
stat446 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/446.png | According to data from the National Bureau of Statistics, the Consumer Price Index (CPI) for urban residents in China over the past 10 years is shown in the chart below. Which of the following statements is incorrect? ( ) | A | ["From 2015 to 2019, the urban residents' consumer price index increased year by year.", "The maximum and minimum values of the urban residents' consumer price index in the past 10 years differ by 1.8.", "The average value of the urban residents' consumer price index in the past 10 years is 102.1.", "The median value of the urban residents' consumer price index in the past 10 years is 102.1."] | multi_choice |
stat466 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/466.png | On the school basketball court, five students from Class 3 (1) are competing. The heights of the five players on the court are shown in the statistical chart below, where '△' represents the heights of the five players before the substitution, and '○' represents the heights of the five players after the substitution. Compared to the heights before the substitution, the heights of the players on the court after the substitution are ( )
A. Mean remains the same, variance decreases
B. Mean remains the same, variance increases
C. Mean increases, variance decreases
D. Mean increases, variance increases | B | ['The average height does not change, and the variance decreases.', 'The average height does not change, and the variance increases.', 'The average height changes, and the variance decreases.', 'The average height changes, and the variance increases.'] | multi_choice |
stat468 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/468.png | To respond to the 'Double Reduction' policy and further implement the philosophy of 'Moral Education, Comprehensive Development in Five Domains,' a school in Shenzhen actively promoted the reform of student comprehensive quality evaluation. Xiaofang's scores in moral, intellectual, physical, aesthetic, and labor evaluations for this semester are shown in the figure. The scores for each category are 9, 8, 10, 8, and 7, respectively. What are the mode, median, and mean of these five evaluation scores corresponding to the student? ( ) | D. 8, 8, 8.4 | ['8, 8, 8', '7, 8, 7.8', '8, 8, 8.7', '8, 8, 8.4'] | multi_choice |
stat480 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/480.png | Let the history of mathematics enter the classroom, and let mathematical classics enter students' lives. In a mathematics history knowledge competition held at a school, Xiao Ming collected the results of this competition and drew the following pie chart. The average score of this competition is ( ). | D | ['85 points', '90 points', '80 points', '87.6 points'] | multi_choice |
stat518 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/518.png | A pig farm conducted a survey of the weights of 200 pigs and obtained a frequency distribution histogram (each group includes the lower boundary but excludes the upper boundary) as shown in the figure. Among them, pigs weighing 80kg or more are ( ). | C | ['20 pigs', '50 pigs', '140 pigs', '200 pigs'] | multi_choice |
stat554 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/554.png | 7. As shown in the figure, the results of a computer-simulated random coin toss experiment are given. Below are three inferences: ① When the number of tosses is 100, the computer records the probability of 'heads up' as 0.47; ② As the number of tosses increases, the frequency of 'heads up' stabilizes around 0.5, showing consistency, suggesting that the probability of 'heads up' can be estimated as 0.5; ③ If this experiment is simulated again using a computer, then when the number of tosses is 150, the frequency of 'heads up' will surely be 0.45. Which of the following is reasonable?
A. ①③ B. ② C. ②③ D. ①③ | B | ['①', '②', '①②', '①③'] | multi_choice |
stat577 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/577.png | The greening department of a certain city has illustrated the survival situation of a transplanted sapling in the following statistical diagram. If 1000 of these saplings are planted, estimate the number of saplings expected to survive ( ). | B. 900 | ['950', '900', '850', '800'] | multi_choice |
stat590 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/590.png | 8. The number of students participating in extracurricular interest groups in a school is shown in the chart. If there are 60 students in the chess group, then the number of students in the labor practice group is ( ). | B | ['75', '90', '108', '120'] | multi_choice |
stat597 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/597.png | Since ancient times, China has had the tradition of planting trees. Planting trees can purify the air, prevent desertification, and is significant for regulating the climate, conserving water resources, and reducing air pollution. It is optimal to plant trees during the Qingming Festival because the weather is warm and suitable for sapling survival. The forestry bureau has plotted a statistical chart showing the survival of a certain type of sapling after transplantation. Based on this, the probability of the sapling's survival after transplantation is approximately ( ). | C | ['0.80', '0.85', '0.90', '0.95'] | multi_choice |
stat621 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/621.png | With the continuous development of technology and increasing emphasis on environmental protection, new energy vehicles are becoming increasingly popular. A dealership of a certain brand of new energy vehicles recorded the sales for the first quarter of this year (as shown in the figure). If the monthly average growth rate of sales for this brand is x, then based on the information in the figure, the equation satisfied by x is ( ). | A | ['200(1 + x)^2 = 242', '242(1 + x)^2 = 200', '2(1 + x) = 242 ÷ 200', '2x = 242 - 200'] | multi_choice |
stat645 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/645.png | The 'Zhao Shuang string diagram' is composed of four congruent right triangles and a small square in the middle, forming a large square (as shown in the figure). Xiao Liang randomly throws darts into the internal area of the large square. If the lengths of the two perpendicular sides of the right triangle are 2 and 1 respectively, then the probability of the darts landing in the small square (shaded area) is ( ). | A | ['1/5', '1/4', '1/3', '1/6'] | multi_choice |
stat648 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/648.png | As shown in the figure, each of the four opaque bags contains three balls of different colors. If one ball is randomly drawn from each bag, which bag makes drawing a red ball a certain event ( )? | D | ['①', '②', '③', '④'] | multi_choice |
stat649 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/649.png | As shown in the figure, based on the average height growth chart of male students in a certain area, determine during which age group the boys experience faster height growth ( ). | B | ['5-10 years', '10-15 years', '15-20 years', 'Uncertain'] | multi_choice |
stat717 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/717.png | In a school's shooting competition, the target has three scoring zones: 8 rings, 9 rings, and 10 rings, with each ring further divided into 10 smaller segments. Xiaoxin, Xiaoyu, and Xiaohua each shoot three times, and their results are shown in the diagram. The one whose average shooting score is approximately 9.0 rings is ( ). | C | ['Xiaoxin', 'Xiaoyu', 'Xiaohua', 'All three are possible'] | multi_choice |
stat733 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/733.png | Lanzhou City's current urban residents' water usage is divided into three levels, with progressively increasing water prices. The first level is for usage not exceeding 144m³ per year per household, which follows the current residential water price; the second level is for usage exceeding 144m³ but not exceeding 180m³ per year, charged at 1.5 times the current water price; the third level is for usage exceeding 180m³ per year, charged at 3 times the current water price. A volunteer team from a residential community randomly surveyed 50 households to understand the residents' water usage and compiled a frequency histogram (as shown in the figure). Given that the community has 1,000 households in total, estimate the number of households whose annual water usage reaches the third level ( ). | C | ['30', '45', '60', '90'] | multi_choice |
stat738 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/738.png | A school has a total of 800 students. To understand holiday reading habits, 80 students were randomly surveyed, and the results were presented in the form of a statistical chart. Estimate the number of students in the entire school who read 5 books. | D. 60 students | ['240 students', '200 students', '140 students', '60 students'] | multi_choice |
stat74 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/74.png | A survey was conducted among students in a class regarding their favorite extracurricular activity (each student chooses one activity), and the results were displayed in a statistical chart as shown. It is known that the number of students who chose shuttlecock kicking is 9 fewer than those who chose basketball. How many students chose 'Other' activities? | 15 | NULL | free_form |
stat777 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/777.png | Every April 23rd is "World Book Day." Reading can enrich knowledge, broaden horizons, enhance life, and bring us joy. A middle school in Kunming plans to set up a book corner in each class. To reasonably allocate various types of books, the school committee conducted a survey themed "My Favorite Books" among all students and collected data on their favorite types of books (A. Science, B. Literature, C. Sports, D. Others). Based on the incomplete statistical chart provided, which of the following statements is correct? A. The number of students who like literature in this sampling is 30. B. The sample size of this survey is 180. C. The number of students who like science books in this sampling is 70. D. If the school has 2600 students, the number of students who like science books is approximately 520. | D | ['The number of people who like literature books in this sample is 30.', 'The sample size of this survey is 180.', 'The number of people who like science books in this sample is 70.', 'If the school has 2600 students, the number of students who like science books is about 520.'] | multi_choice |
stat784 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/784.png | As shown in the figure, this is a square dartboard made by Xiaoming. If he can hit the dartboard every time he throws a dart, what is the probability that a randomly thrown dart will land exactly in the shaded area? | B | ['1/2', '1/4', '1/6', '1/8'] | multi_choice |
stat793 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/793.png | In this year's charity fund donation activity, a certain unit conducted statistics on the number of people who donated 100 RMB, 200 RMB, 300 RMB, 400 RMB, and 500 RMB respectively, and created the following statistical chart. Which of the following four pieces of information obtained from the chart is correct ( ). | C | ['The higher the donation amount, the fewer the number of people donating.', 'The number of people donating 400 yuan is more than the number of people donating 200 yuan.', 'The number of people donating 300 yuan is the highest.', 'The number of people donating 200 yuan is the lowest.'] | multi_choice |
stat796 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/796.png | The soil in Shanxi is fertile and well-sunlit, which makes it suitable for the cultivation of corn. Corn is one of the major economic crops in the Shanxi region. The laboratory staff of the quality inspection center recorded the germination test results of a certain type of corn seed under the same conditions as shown in the table below:
| Batch Size | 300 | 500 | 800 | 700 | 2000 | 2000 | 3000 |
|------------|-----|-----|-----|-----|------|------|------|
| Number of Germinations | 284 | 475 | 762 | 1948 | 1895 | 2847 |
| Germination Frequency | 0.947 | 0.95 | 0.953 | 0.948 | 0.927 | 0.949 |
The approximate germination probability of these corn seeds is ( )
A. 0.93
B. 0.94
C. 0.95
D. 0.96 | C | ['0.93', '0.94', '0.95', '0.96'] | multi_choice |
stat809 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/809.png | A certain school organizes a one-time hot volleyball team competition for all classes across nine grades. Each class selects 7 students to form a participating team. The one-time hot volleyball scores (units: count) of the 7 students selected from Grade 9 (Class 1) are shown in the figure. Which of the following conclusions is correct ( )? | B. The mode is 26 | ['The median is 17', 'The mode is 26', 'The average score is 20', 'The variance is 0'] | multi_choice |
stat811 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/811.png | As shown in the figure, there is a spinning wheel. The central angles of sectors 1, 2, and 4 are 60°, 70°, and 80°, respectively. If the wheel is spun randomly, what is the probability that the pointer will land on sector 3? ( ) | B | ['1/2', '5/12', '1/3', '4/9'] | multi_choice |
stat851 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/851.png | A school organized students to participate in a tree-planting activity. After the activity, the tree-planting details of 50 students from Class A, Grade 9, were recorded and summarized in the following statistical table:
Number of trees planted | 3 | 4 | 5 | 6
Number of students | 20 | 15 | 10 | 5
What was the average number of trees planted per student among these 50 students? | 4 | NULL | free_form |
stat924 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/924.png | The results of a germination experiment of a certain kind of rice seeds under the same conditions are as follows:
Number of seeds per batch: 1000 1200 1000 1500 500 500
Number of germinated seeds: 904 942 728 922 390 485
Germination frequency: 0.904 0.785 0.728 0.615 0.78 0.97
What is the estimated germination frequency of this rice seed (rounded to 0.1)? | 0.9 | NULL | free_form |
stat996 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/996.png | In order to understand the water usage of residents in a community, a random sample of water usage from 10 households was taken. The results are as follows:
Water usage/month (tons) |10|13|14|17|18|
Number of households |3 |1 |3 |2 |1 |
What is the median water usage of these 10 households? | 14 tons | NULL | free_form |
stat482 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/482.png | The minimum daily temperatures for the first five days of April in areas A and B are shown in the figure. Which of the following statements is correct?
A. The median of the minimum temperatures in area A is 6°C
B. The mode of the minimum temperatures in area A is 4°C
C. The average minimum temperature in area B is 5°C
D. The minimum temperature in area B is relatively stable | A | ['The median of the lowest temperature in region Jia is 6℃', 'The mode of the lowest temperature in region Jia is 4℃', 'The lowest temperature in region Yi is relatively stable', 'The average of the lowest temperature in region Yi is 5℃'] | multi_choice |
stat524 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/524.png | A school organized extracurricular activities, setting up four clubs: Arts, Sports, Reading, and Interest groups (assuming that every student is required to participate in one club, and can only choose one). To understand which type of club activities students prefer, the school conducted a survey and created two incomplete statistical charts as shown in Figure ① and Figure ②. Based on the given information, which of the following conclusions is correct? ( ). A. The sample size of this survey is 50. B. The central angle corresponding to the Reading club's sector is 90°. C. There are 16 students in the sample who prefer the Sports club. D. If the school has a total of 800 students, then 200 of them prefer the Arts club. | B | ['The sample size of this survey is 50', 'The central angle of the fan-shaped corresponding to the Reading club is 90°', 'There are 16 people in the sample who like the Sports club', 'If there are 800 students in the school, then there are 200 people who like the Art club'] | multi_choice |
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