### NCERT Solutions for Class 6 Maths Chapter 9 Data Handling Ex 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.**

**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?**

**Solution:**

From the given information, we have the following bar graph.

Activity reading story books is preferred by the most of the students other than playing.

**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.**

**Solution:**

From the given information, we have the following bar graph:

**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 bar graph. Choose a scale of your choice.**

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

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

**Solution:**

From the given information, we have:

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

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

**Ex 9.4 Class 6 Maths Question 4.**

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

**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?**

**Solution:**

From the above information, we have the bar graph.

(a) Age groups of 30 – 44 and 45 – 59 have the same population.

(b) Number of Senior citizens are 80,000 + 40,000 = 1,20,000