NCERT Answers for Class 6 Maths Chapter 9 |
Data Handling Exercise 9.4
Ex 9.4 Class 6 Maths 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|
|Reading story books||30|
|Listening to music||10|
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?
By taking a scale of 1 unit length = 5 students, bar graph is shown below considering the above data
Ex 9.4 Class 6 Maths Question 2. The number of Mathematics books sold by a shopkeeper on six consecutive days is shown below :
Draw a bar graph to represent the above information choosing the scale of your choice.
By taking a scale of 1 unit length = 10 books we may draw a bar graph of above data as follows
Ex 9.4 Class 6 Maths 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
|Years||Number of bicycles manufactured|
(a) In which year were the maximum number of bicycles manufactured?
(b) In which year were the minimum number of bicycles manufactured?
By taking a scale of 1 unit length = 100 bicycles we may draw a bar graph of above data as follows
(a) In the year 2002, maximum number of bicycles were manufactured i.e 1200 bicycles
(b) In the year 1999, minimum number of bicycles were manufactured i.e 600 bicycles
Ex 9.4 Class 6 Maths Question 4. Number of persons in various age groups in a town is given in the following table.
|1-14||15-29||30-44||45-59||60-74||75 and above|
|2 lakhs||1 lakh
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?
By taking a scale of 1 unit length = 20 thousands we may draw a bar graph of above data as follows
(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 are 1 lakh 20 thousand