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NCERT · Class 6 · Maths

Chapter 9: Data Handling

Practice each question, then open the answer or worked solution.

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Exercise 9.4

Textbook page 202 · 4 questions
Q1Written answer

A survey of 120 school students was done to find which activity they prefer to do in their free time.

Preferred activity Number of Students
Playing 45
Reading story books 30
Watching T.V 20
Listening to music 10
Painting 15

 

Draw a bar graph to illustrate the above data taking scale of 1 unit length = 5 students. Which activity is preferred by most of the students other than playing?

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Worked solution

By taking a scale of 1 unit length = 5 students, a bar graph is shown below considering the above data

NCERT Solutions for Class 6 Maths Chapter 9 Exercise 9.4 - 1

Reading storybooks is the activity preferred by most of the students other than playing

Q2Written answer

The number of Mathematics books sold by a shopkeeper on six consecutive days is shown below:

Days Sunday Monday Tuesday Wednesday Thursday Friday
Number of books sold 65 40 30 50 20 70

Draw a bar graph to represent the above information choosing the scale of your choice.

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Worked solution

By taking a scale of 1 unit length = 10 books, we may draw a bar graph of the above data as follows:

NCERT Solutions for Class 6 Maths Chapter 9 Exercise 9.4 - 2

Q3Written answer

Following table shows the number of bicycles manufactured in a factory during the years 1998 to 2002. Illustrate this data using a bar graph. Choose a scale of your choice

Year Number of bicycles manufactured
1998 800
1999 600
2000 900
2001 1100
2002 1200

(a) In which year was the maximum number of bicycles manufactured?

(b) In which year was the minimum number of bicycles manufactured?

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Worked solution

By taking a scale of 1 unit length = 100 bicycles, we may draw a bar graph of the above data as follows:

NCERT Solutions for Class 6 Maths Chapter 9 Exercise 9.4 - 3

(a) In the year 2002, the maximum number of bicycles were manufactured, i.e., 1200 bicycles

(b) In the year 1999, the minimum number of bicycles were manufactured, i.e., 600 bicycles

Q4Written answer

Number of persons in various age groups in a town is given in the following table.

Age group

(in years)

 1-14 15-29 30-44 45-59 60-74 75 and above
Number of persons 2 lakhs 1 lakh 60 thousand 1 lakh 20 thousand 1 lakh 20 thousand 80 thousand 40 thousand

Draw a bar graph to represent the above information and answer the following questions. (take 1 unit length = 20 thousands)

(a) Which two age groups have the same population?

(b) All persons in the age group of 60 and above are called senior citizens. How many senior citizens are there in the town?

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Worked solution

By taking a scale of 1 unit length = 20 thousand, we may draw a bar graph of the above data as follows:

NCERT Solutions for Class 6 Maths Chapter 9 Exercise 9.4 - 4

(a) The two age groups which have same population are 30-44 and 45-59

(b) Senior citizens are the persons between the age group either from 60-74 or from 75 above. Therefore

Number of senior citizens in the town = 80000 + 40000

= 1 lakh 20 thousand

Hence, the number of senior citizens in the town is 1 lakh 20 thousand.

Disclaimer: 

Dropped Topics – 9.6 Drawing a pictograph, 9.7 A bar graph, 9.7.1 Interpretation of a bar graph, 9.7.2 Drawing a bar graph.