NCERT Class 7 Mathematics Solutions: Chapter 3 – Data Handling Exercise 3.1 Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Understanding the Chart of Data Handling

1. Find the range of heights of any ten students of your class.

Answer:

Name of Students and Height
Sr. No.Name of studentsHeight (in feet)
1Gunjan
2Aditi
3Nikhil
4Akhil
5Riya
6Akshat
7Abhishek
8Mayank
9Rahul
10Ayush

Table title: Given 10 students of class

Table description: Give the range of heights of any ten students of class

Range: Highest height lowest height

2. Organize the following marks in a class assessment, in a tabular form:

.

(i) Which number is the highest?

(ii) Which number of the lowest?

(iii) What is the range of the lowest?

(iv) Find the arithmetic mean?

Answer:

Calculating Tally of Marks and Their Frequency

Table title: Table shows the marks in a class assessment

Table description: Table shows the marks in a class assessment

(i) Height number

(ii) Lowest number

(iii) Range

(iv)

Sum of all the observations

Total number of observations

Arithmetic mean