NCERT Solutions Class 6 Maths
Chapter – 9 (Data Handling)
The NCERT Solutions in English Language for Class 6 Mathematics Chapter – 9 Data Handling Exercise 9.4 has been provided here to help the students in solving the questions from this exercise.
Chapter 9: Data Handling
- NCERT Solution Class 6 Maths Exercise – 9.1
- NCERT Solution Class 6 Maths Exercise – 9.2
- NCERT Solution Class 6 Maths Exercise – 9.3
Exercise – 9.4
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 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?
Solutions:
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.
2. 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.
Solutions:
From the given information, we have the following bar graph:
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.
| Year | Number of bicycles manufactured |
| 1998 | 800 |
| 1999 | 600 |
| 2000 | 900 |
| 2001 | 1100 |
| 2002 | 1200 |
(a) In which year were the maximum number of bicycles manufactured?
(b) In which year were the minimum number of bicycles manufactured?
Solutions:
From the above information, we have the bar graph.
(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.
4. 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 thousands | 1 lakh 20 thousands | 1 lakh 20 thousands | 80 thousands | 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?
Solutions:
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.
