Statistics Class 7 Practice Set 54 Answers Solutions Chapter 15
Question 1
Maharashtra Board Solution
The daily rainfall for each day of a week in a certain city is given in millimeters. Find the average rainfall during the week. 9, 11, 8, 20, 10, 16, 12
Solution & Step-by-Step Answer:
= = = 12.285 ≈ 12.29 ∴ The average rainfall during the week is 12.29 mm.
Question 2
Maharashtra Board Solution
During the annual function of a school, a Women’s Self-help Group had set up a snacks stall. Their sales every hour were worth Rs 960, Rs 830, Rs 945, Rs 800, Rs 847, Rs 970 respectively. What was the average of the hourly sales?
Solution & Step-by-Step Answer:
= = = Rs 892 ∴ The average of the hourly sales was Rs 892.
Question 3
Maharashtra Board Solution
The annual rainfall in Vidarbha in five years is given below. What is the average rainfall for those 5 years? 900 mm, 650 mm, 450 mm, 733 mm, 400 mm.
Solution & Step-by-Step Answer:
= = = 626.6 ∴ The average rainfall in Vidarbha for 5 years was 626.6 mm.
Question 4
Maharashtra Board Solution
A farmer bought some sacks of animal feed. The weights of the sacks are given below in kilograms. What is the average weight of the sacks? 49.8, 49.7, 49.5, 49.3, 50,48.9, 49.2, 48.8.
Solution & Step-by-Step Answer:
= = = = 49.4 ∴ The average weight of the sacks is 49.4 kg.
Maharashtra Board Class 7 Maths Chapter 15 Statistics Practice Set 54 Intext Questions and Activities
Question 1
Maharashtra Board Solution
Rutuja practised skipping with a rope all seven days of a week. The number of times she jumped the rope in one minute every day is given below. Find the average number of jumps per minute. 60, 62, 61, 60, 59, 63, 58. (Textbook pg. no. 96)
Solution & Step-by-Step Answer:
= = = 60.42 ∴ Average number of jumps per minute = 60.4