NCERT Solutions for Class 7 Mathematics Chapter 3
Important NCERT Questions
Class vii Math Chapter 3 Data Handling Exercise 3.1
NCERT Books for Session 2022-2023
CBSE Board
Questions No: 8
The rainfall (in mm) in a city on 7 days of a certain week was recorded as follows: (i) Find the range of the rainfall in the above data. (ii) Find the mean rainfall for the week. (iii) On how many days was the rainfall less than the mean rainfall?
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(i) The range of the rainfall = Highest rainfall – Lowest rainfall
= 20.5 – 0.0 = 20.5 mm
(ii) Main rainfall = Sum of rainfall recorded/Total number of days
= 0.0+12.2+2.1+2.2+20.5+5.5+1.0/7 = 41.3/7 = 5.9 mm
(iii) 5 days. i.e., Monday, Wednesday, Thursday, Saturday and Sunday rainfalls
were less than the mean rainfall.
Class 7 Maths Chapter 3 Exercise 3.1
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i find the range of the fall of in the above data
Answer
Highest rain fall- lowest fall
20.5 – 0.0 20.5