NCERT Class 7 Mathematics Solutions: Chapter 3 –Data Handling Exercise 3.1 Part 1

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Understanding the chart of data handling

Understanding the Chart of Data Handling

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

Answer:

Name of students and height

Sr. No.

Name of students

Height (in feet)

1

Gunjan

2

Aditi

3

Nikhil

4

Akhil

5

Riya

6

Akshat

7

Abhishek

8

Mayank

9

Rahul

10

Ayush

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

Tally Table: Marks and Their Frequency

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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