NCERT Solutions for Class 6 Math Chapter 9 Data Handling Exercise 9.4 ~ evidya

Exercise 9.4

Ex-9.1
Ex-9.2
Ex-9.3
Ex-9.4

Q 1 - Ex 9.4 - Data Handling - NCERT Maths Class 6th - Chapter 9

Page No 202:

Question 1:

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 TV	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?

Answer:

By taking a scale of 1 unit length = 5 students, a bar graph of the above given data can be drawn as follows.

The activity that is preferred by most of the students, other than playing, is reading story books.

Q 2 - Ex 9.4 - Data Handling - NCERT Maths Class 6th - Chapter 9

Page No 203:

Question 2:

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

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

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

Answer:

By taking a scale of 1 unit length = 10 books, a bar graph of the above given data can be drawn as follows.

Q 3 - Ex 9.4 - Data Handling - NCERT Maths Class 6th - Chapter 9

Question 3:

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.

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

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

Answer:

By taking a scale of 1 unit length = 100 bicycles, a bar graph of the above given data can be drawn as follows.

(a) The number of bicycles manufactured in 2002 was the maximum, i.e., 1200.
(b) The number of bicycles manufactured in 1999 was the minimum, i.e., 600.

Q 4 - Ex 9.4 - Data Handling - NCERT Maths Class 6th - Chapter 9

Question 4:

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

Age group	1 − 14	15 − 29	30 − 44	45 − 59	60 −74	75 and above
Number of persons	2 lakhs	1 lakhs 60 thousands	1 lakh 20 thousands	1 lakh 20 thousands	80	40 Thousands

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 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?

Answer:

By taking a scale of 1 unit length = 20 thousands, a bar graph of the above given data can be drawn as follows.

(a) 30 − 44 and 45 − 59 are the two age groups which have the same population.
(b) It can be inferred that senior citizens are the people who are either from age group 60 − 74 or from age group 75 and above.
Hence, number of senior citizens = 80,000 + 40,000
= 1 lakh 20 thousand

Monday, May 25, 2020