# NCERT Solutions and Notes for Class 6 Maths Chapter 9: Data Handling (Free PDF)

In this chapter, students will understand everything related to Data Handling. The chapter is very important is it lays the foundation for understanding Data Handling for complex calculations. Students will learn concepts like recording and organizing data. After completing this chapter, students will be able to make a pictograph for the given data set and interpret its results. Chapter 9 of Class 6 Maths will be useful for students in all their higher study lessons. Read through for CBSE NCERT Class 6 Maths Data Handling: Chapter 9 Notes and Important Exercise Questions.

## CBSE NCERT Class 6 Maths Data Handling: Chapter 9 Notes – PDF Download

Below we have given topic-wise notes for the CBSE NCERT Class 6 Maths Data Handling: Chapter 9. We have also provided a downloadable free PDF at the end of these notes so you can download and take a printout to study later when you need quick revision before going to the exam hall.

### Topic 1: What is Data?

Data is a collection of numbers gathered to give some information.

### Topic 2: Organisation of Data

The organization of data involves separating and arranging different data based on some given/desired parameters.

### Topic 3: Pictograph

A pictograph represents data through pictures of objects. It helps answer the questions on the data at a glance.

### Topic 4: Bar Graph

Bars of uniform width can be drawn horizontally or vertically with equal spacing between them and then the length of each bar represents the given number. Such a method of representing data is called a bar diagram or a bar graph.

## Important Questions in NCERT Class 6 Maths Chapter 9: PDF Download

Below we have provided some important exercise questions and their solutions from Class 6 Maths Data Handling: Chapter 9.

### Exercise 9.1

Q 1.  Following is the choice of sweets for 30 students of Class VI.

1. Arrange the names of sweets on a table using tally marks.
2. Which sweet is preferred by most of the students?

Ans. (a) The sweets are arranged using the tally marks below.

(b) Laddoos are favored by most of the students.

Q 2.  The following pictograph shows the number of tractors in five villages.

Observe the pictograph and answer the following questions.

1. Which village has the minimum number of tractors?
2. Which village has the maximum number of tractors?
3. How many more tractors does village C have as compared to village B?
4. What is the total number of tractors in all the five villages?

Ans. The answers to the given questions are given below.

1. Village D has the minimum number of tractors.
2. Village C has the maximum number of tractors.
3. Village C has 3 more tractors than Village B.
4. The total number of tractors in all the 5 villages = 6 + 5 + 8 + 3 + 6 = 28 tractors.

### Exercise 9.2

Q 1.  The total number of animals in the five villages is as follows :

Village A: 80

Village B: 120

Village C: 90

Village D: 40

Village E: 60

Prepare a pictograph of these animals using one ☐ symbol to represent 10 animals

and answer the following questions :

1. How many symbols represent the animals of village E?
2. Which village has the maximum number of animals?
3. Which village has more animals: village A or village C?

Ans. Since one ☐ = 10 animals, the pictograph of the given data is:

1. A total of 6 symbols represent the animals of Village E.
2. Village B has the maximum number of animals.
3. Village A has 80 animals and Village C has 90 animals. So, village C has more animals.

### Exercise 9.3

Q 1. The bar graph given below shows the amount of wheat purchased by the government during the years 1998-2002.

Read the bar graph and write down your observations. In which year was:

1. the wheat production maximum?
2. the wheat production minimum?

Ans. The answers are given below.

1. The wheat production was maximum in 2002, i.e. 5 × 30 = 150 thousand tonnes.
2. The wheat production was minimal in 1998, i.e. 5 × 15 = 75 thousand tonnes.

Q 2. Observe the bar graph below which shows the sale of shirts in a ready-made shop from Monday to Saturday.

Now answer the following questions :

1. What information does the above bar graph give?
2. What is the scale chosen on the horizontal line representing the number of shirts?
3. On which day was the maximum number of shirts sold? How many shirts were sold on that day?
4. On which day were the minimum number of shirts sold?
5. How many shirts were sold on Thursday?

Ans. The answers to the above questions are given below.

1. The bar graph shows the number of shirts sold from Monday to Saturday in a ready-made shop.
2. 1 unit length = 20 shirts sold is the scale chosen in the given bar graph.
3. The maximum number of shirts were sold on Saturday, i.e. 60 shirts.
4. The minimum number of shirts were sold on Tuesday.
5. 35 shirts were sold on Thursday.

### Exercise 9.4

Q 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 a scale of 1 unit length = 10 students. Which activity is preferred by most of the students other than playing?

Ans. The bar graph for the above data taking a scale of 1 unit length = 10 students is given below.

Students prefer to read story books rather than play.

Also See:

Class 6 Maths Chapter 1 Knowing Our Numbers Notes and Important Questions – Free PDF

CBSE NCERT Class 6 Maths Chapter 2 Whole Numbers Notes, Exercise, and Important Questions – Free PDF

Class 6 Maths Chapter 3 Playing With Numbers Notes and Important Exercise Questions and Answers – Free PDF

Class 6 Maths Chapter 4 Basic Geometrical Ideas Notes and Important Exercise Questions and Answers – Free PDF

Class 6 Maths Chapter 5 Understanding Elementary Shapes Notes and Important Exercise Questions and Answers – Free PDF

Class 6 Maths Chapter 6 Integers Notes and Important Exercise Questions and Answers – Free PDF

## FAQs

Q.1. What is a Pictograph?

Ans: A pictograph represents data through pictures of objects. It helps answer the questions on the data at a glance.

Q.2. What is a bar graph?

Ans: Bars of uniform width can be drawn horizontally or vertically with equal spacing between them and then the length of each bar represents the given number. Such a method of representing data is called a bar diagram or a bar graph.

Q.3. What is data class 6 Maths?

Ans: Data is a collection of numbers gathered to give some information.

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