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21.03.2021, adminExercise 3. Question 1: Find the range of heights of any ten students of your class. Question 2: Organise the following marks in a class assessment, in a tabular form. Question 3: Find the mean of the first five whole numbers.
Byjus class 7 maths chapter 3 work First five whole numbers are 0, 1, 2, 3, and 4. Therefore, the mean of first five whole numbers is 2. Question 4: A cricketer scores the following runs in eight innings: 58, 76, 40, 35, 46, 45, 0, Find the mean Byjus Class 8 Maths Chapter 4 Workbook score. Answer: Runs scored by the cricketer are 58, 76, 40, 35, 46, 45, 0, and Therefore, mean score is Question 5: Following table shows the points of each player scored in four games:.
How would you find the mean? Answer: ii To find the mean number of points per game for C, we will divide the total points by 3 because C played 3 games. Now we can observe that the average of A is Therefore, A is the best performer among these. Question 6: The marks out of obtained by a group of students in a science test are 85, 76, 90, 85, 39, 48, 56, 95, 81 and Find the: i Highest and the lowest marks obtained by the students.
Answer: The marks obtained by the group of students in a science test can be arranged in an ascending order as follows. Question 7: The enrolment in a school during six consecutive years was as follow:,Find the mean enrolment of the school for this period. Question 8: The rainfall in mm in a city on 7 days of a certain week was recorded as follows:.
Question 9: The heights of 10 girls were measured in cm and the results are as follows:,,i What is the height of the tallest girl? Question 1: The scores in mathematics test out Byjus Class 8 Maths Chapter 3 Work of 25 of 15 students is as follows: 19, 25, 23, 20, 9, 20, 15, 10, 5, 16, 25, 20, 24, 12, 20 Find the mode and median of this data. Are they same? Answer: Scores of 15 students in mathematics test are 19, 25, 23, 20, 9, 20, 15, 10, 5, 16, 25, 20, 24, 12, 20 Arranging these scores in an ascending order, 5, 9, 10, 12, 15, 16, 19, 20, 20, 20, 20, 23, 24, 25, 25 Mode of a given data is that byjus class 7 maths chapter 3 work of observation which occurs for the most number of times.
Median of a given data is the middle observation when the data is arranged in an ascending or descending order. As there are 15 terms in the given data, therefore, the median of this data will be the 8th observation. Question 2: The run scored in a cricket match by 11 players is as follows: 6, 15,50,80, 10, 15, 8, 10, 15 Find the mean, mode and median of this data.
Are the three same? Answer: The runs scored by 11 players are 6, 15,50,80, 10, 15, 8, 10, 15 Arranging these scores in an ascending order, 6, 8, 10, 10, 15, 15, 15, 50, 80,Mode of a given data is that value of observation which occurs for the most number of times and the median of the given data is the middle observation when the data is arranged in an ascending or descending order.
As there are 11 terms in the given data, therefore, the median of this data will be the 6th observation. Question 3: The weights in kg. Answer: The weights of 15 students are 38, 42, 35, 37, 45, 50, 32, 43, 43, 40, 36, 38, 43, 38, 47 Arranging these weights in ascending order, 32, 35, 36, 37, 38, 38, 38, 40, 42, 43, 43, 43, 45, 47, 50 i Mode of a given data is that value of observation which occurs for the most number of times and the median of the given data is the middle observation when the data is arranged in an ascending or descending order.
Question 4: Find the mode and median of the data: 13, 16, 12, 14, 19, 12, 14, 13, 14 Answer: The given data is 13, 16, 12, 14, 19, 12, 14, 13, 14 Arranging the given data in an ascending order, 12, 12, 13, 13, 14, 14, byjus class 7 maths chapter 3 work, 16, 19 Mode of a given data is that value of observation which occurs for the most number of times and the median of the given data is the middle observation when the data is arranged in an ascending or descending order.
As there are 9 terms in the given data, therefore, the byjus class 7 maths chapter 3 work of this data will be the 5th observation. Question 5: Tell whether the statement is true or false: i The mode is always one of the numbers in a data.
Answer: i True Mode of a given data is that value of observation which occurs for the most number of times. Therefore, it is one of the observations given in the data. Question 1: Use the bar graph see the given figure to answer the following questions. Answer: a Since the bar representing cats is the tallest, cat is the most popular pet. Question 2: Read the bar graph see the given figure which shows the number of books sold by a bookstore during five consecutive years and answer the questions that follow: i Byjus class 7 maths chapter 3 work how many books were sold in ?
About books sold? Answer: i Inbooks were byjus class 7 maths chapter 3 work. Inbooks were sold. Therefore, about books were sold in the year Question 3: Number of children in six different classes are given. Represent the data on a bar graph. And the minimum? Similarly, since the bar representing the number of children for byjus class 7 maths chapter 3 work tenth is the smallest, there are minimum number of children in class tenth.
Therefore, the ratio between the number of students of class sixth and the number of. Question 4: The performance of students in 1st Term and 2nd Term is given. Draw a double bar graph choosing appropriate scale and answer the following:. Answer: A double bar graph for the given data is as follows.
Therefore, the child has improved his performance the most in Maths. What do you infer from the bar graph? Answer: i A double bar graph for the given data is as follows. The double bar graph represents the number of people who like watching and participating in different sports.
It can be observed that most of the people like watching and participating in cricket while the least number of people like watching and participating in athletics. Hence, cricket is the most popular sport. Hence, watching different types of sports is more preferred than participating in the sports. Question 6: Take the data giving byjus class 7 maths chapter 3 work minimum and the Byjus Class 6 Maths Chapter 10 Work maximum temperature of various cities given in the following table: Temperatures of the cities as on Plot a double bar graph using the data and answer the following: i Which city has the largest difference in the minimum and maximum temperature on the given date?
Answer: A double bar graph for the given data is constructed as follows. Question 1: Tell whether the following is certain to happen, impossible, can byjus class 7 maths chapter 3 work but not certain. Answer: byjus class 7 maths chapter 3 work Certain ii Can happen but not certain iii. Impossible as there are only six faces on a dice marked as 1, 2, 3, 4, 5, 6 on it. Question 2: There are 6 marbles in a box with numbers from 1 to 6 marked on each of.
Question 3: A coin is flipped to decide which team starts the game. What is the probability that your team will start? One team can opt either Head or Tail.
Question 4: A box contains pairs of socks of two colours black and white. I have picked out a byjus class 7 maths chapter 3 work sock. I pick out one more with my eyes closed. What is the probability that it will make a pair? Answer: It can be observed that while closing the eyes, one can draw either a black byjus class 7 maths chapter 3 work or a white sock. Therefore, there are two possible cases.
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