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Exercise 9.4 - Chapter 9 Data handling class 6 ncert solutions Maths - SaraNextGen [2024]


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.

https://img-nm.mnimgs.com/img/study_content/curr/1/6/1/9/2498/Exercise%20-%209_html_5f71a8d6.jpg

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

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.

https://img-nm.mnimgs.com/img/study_content/curr/1/6/1/9/2505/Exercise%20-%209_html_60124845.jpg

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.

https://img-nm.mnimgs.com/img/study_content/curr/1/6/1/9/2515/Exercise%20-%209_html_m7d35f15a.jpg

(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.

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.

https://img-nm.mnimgs.com/img/study_content/curr/1/6/1/9/2520/Exercise%20-%209_html_m163bba76.jpg

(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

Also Read : Exercise-10.1-Chapter-10-Mensuration-class-6-ncert-solutions-Maths

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