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

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
Name of students and corresponding 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

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