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NCERT Solutions for Class 6 Maths Chapter 9 Data Handling

NCERT class 6 maths chapter 9 data handling exercise 9.1

Question:1 In a Mathematics test, the following marks were obtained by 40 students. Arrange these marks in a table using tally marks.

8

1

3

7

6

5

5

4

4

2

4

9

5

3

7

1

6

5

2

7

7

3

8

4

2

8

9

5

8

6

7

4

5

6

9

6

4

4

6

6

(a) Find how many students obtained marks equal to or more than 7.

(b) How many students obtained marks below 4?

Answer:

Marks
Obtained

Tally Marks

Number of
Students

1

\mid \mid

2

2

\mid \mid \mid

3

3

\mid \mid \mid

3

4

\bcancel{\mahsf{\mid \mid \mid \mid }} \mid \mid

7

5

\bcancel{\mahsf{\mid \mid \mid \mid }} \mid

6

6

\bcancel{\mahsf{\mid \mid \mid \mid }} \mid \mid

7

7

\bcancel{\mahsf{\mid \mid \mid \mid }}

5

8

\mid \mid \mid \mid

4

9

\mid \mid \mid

3

Total

40

(a) Number of students who obtained marks equal to or more than 7 = 5 + 4 + 3 = 12

(b) Number of students who students obtained marks below 4 = 3 + 3 + 2 = 8

Question: 2 Following is the choice of sweets of 30 students of Class VI. Ladoo, Barfi, Ladoo, Jalebi, Ladoo, Rasgulla, Jalebi, Ladoo, Barfi, Rasgulla, Ladoo, Jalebi, Jalebi, Rasgulla, Ladoo, Rasgulla, Jalebi, Ladoo, Rasgulla, Ladoo, Ladoo, Barfi, Rasgulla, Rasgulla, Jalebi, Rasgulla, Ladoo, Rasgulla, Jalebi, Ladoo.

(a) Arrange the names of sweets in a table using tally marks.

(b) Which sweet is preferred by most of the students?

Answer:

Sweets

Tally Marks

Number of
Students

Ladoo

\bcancel{\mahsf{\mid \mid \mid \mid }}\bcancel{\mahsf{\mid \mid \mid \mid }}\mid

11

Barfi

\mid \mid \mid

3

Jalebi

\bcancel{\mahsf{\mid \mid \mid \mid }}\mid \mid

7

Rasgulla

\bcancel{\mahsf{\mid \mid \mid \mid }}\mid \mid \mid \mid

9

Total

30

(b) Ladoo is preffered by the maximum number of students, 11 students prefer

Question:3 Catherine threw a dice 40 times and noted the number appearing each time as shown below :

1

3

5

6

6

3

5

4

1

6

2

5

3

4

6

1

5

5

6

1

1

2

2

3

5

2

4

5

5

6

5

1

6

2

3

5

2

4

1

5

Make a table and enter the data using tally marks. Find the number that appeared.

(a) The minimum number of times

(b) The maximum number of times (

c) Find those numbers that appear an equal number of times.

Answer:

Number shown
by the dice

Tally Marks

Number of Times

1

\bcancel{\mahsf{\mid \mid \mid \mid }} \mid \mid

7

2

\bcancel{\mahsf{\mid \mid \mid \mid }} \mid

6

3

\bcancel{\mahsf{\mid \mid \mid \mid }}

5

4

\mid \mid \mid \mid

4

5

\bcancel{\mahsf{\mid \mid \mid \mid }} \bcancel{\mahsf{\mid \mid \mid \mid }} \mid

11

6

\bcancel{\mahsf{\mid \mid \mid \mid }} \mid \mid

7

Total

40

(a) The number that appeared the minimum number of times is 4. ( 4 times)

(b) The number that appeared the maximum number of times is 5. ( 11 times)

(c) 1 and 6 both appeared 7 times.

Question:4 Following pictograph shows the number of tractors in five villages.

Observe the pictograph and answer the following questions.

(i) Which village has the minimum number of tractors?

(ii) Which village has the maximum number of tractors?

(iii) How many more tractors village C has as compared to village B.

(iv) What is the total number of tractors in all the five villages?

Answer: (a) Village D has only three tractors which is the minimum.

(b) Village C has eight tractors which is the maximum.

(c) Village C has eight tractors

Village B has five tractors

Village C has three tractors more than village B.

(d) The total number of tractors in all the villages = 6 + 5 + 8 + 3 + 6 = 28.

Question: 5 The number of girl students in each class of a co-educational middle school is depicted by the pictograph :

Observe this pictograph and answer the following questions :

(a) Which class has the minimum number of girl students?

(b) Is the number of girls in Class VI less than the number of girls in Class V?

(c) How many girls are there in Class VII?

Answer: (a) Class VIII has the minimum number of girls.

Number of girls in class VIII = \frac{3}{2}\times 4=6

(b) Number of girls in class VI = 4\times 4=16

Number of girls in class V = \frac{5}{2}\times 4=10

Therefore the number of girls in Class VI is not less than the number of girls in Class V.

(c) Number of girls in class VII = 3\times 4=12

Question:6 The sale of electric bulbs on different days of a week is shown below :

Observe the pictograph and answer the following questions :

(a) How many bulbs were sold on Friday?

(b) On which day were the maximum number of bulbs sold?

(c) On which of the days same number of bulbs were sold?

(d) On which of the days minimum number of bulbs were sold?

(e) If one big carton can hold 9 bulbs. How many cartons were needed in the given week?

Answer: (a) The number of bulbs sold on Friday = 7\times 2=14 .

(b) On Sunday the maximum number of bulbs were sold.

(c) On both Wednesday and saturday, 8 bulbs were sold.

(d) On Wednesday and saturday, the minimum number of bulbs (8) were sold.

(e) Total number of bulbs sold in the weekend =

\\=(6+8+4+5+7+4+9)\times 2\\ =43\times 2\\ =86

\frac{86}{9}=9 +\frac{5}{9}

Number of cartons required = 9 + 1 = 10 ( we cannot have fractional number of boxes)

Question: 7 In a village six fruit merchants sold the following number of fruit baskets in a particular season :

Observe this pictograph and answer the following questions :

(a) Which merchant sold the maximum number of baskets?

(b) How many fruit baskets were sold by Anwar?

(c) The merchants who have sold 600 or more number of baskets are planning to buy a godown for the next season. Can you name them?

Answer: (a) Martin has sold the maximum number of baskets.

(b) Number of fruit baskets were sold by Anwar = 7\times 100=700

(c) Anwar, Martin and Ranjit Singh have sold more than 600 baskets.

NCERT class 6 maths chapter 9 data handling exercise 9.2

Question:1 Total number of animals in five villages are 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 \small \otimes to represent 10 animals and answer the following questions :

(a) How many symbols represent animals of village E?

(b) Which village has the maximum number of animals?

(c) Which village has more animals: village A or village C?

Answer:

Villages

Number of Animals \small \otimes = Ten Animals

A

\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes

B

\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes

C

\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes

D

\small \otimes\small \otimes\small \otimes\small \otimes

E

\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes\small \otimes

(a) 6 symbols represent animals of village E.

(b) Village B has the maximum number of animals.

(c) Village C has more animals.

Question:2(A) Total number of students of a school in different years is shown in the following table

Years

Number of students

1996

400

1998

535

2000

427

2002

600

2004

623

Prepare a pictograph of students using one symbol  to represent 100 students and answer the following questions:

(a) How many symbols represent total number of students in the year 2002?

(b) How many symbols represent total number of students for the year 1998?

Answer:

(a) 6 symbols represent the total number of students in the year 2002.

(b) \frac{535}{100}=5+\frac{7}{20}

 

 5 and 7/20 symbols , i.e 5 complete and 1 incomplete represent the total number of students for the year 1998.

Question: 2(B) Total number of students of a school in different years is shown in the following table

Years

Number of students

1996

400

1998

535

2000

472

2002

600

2004

623

Prepare another pictograph of students using any other symbol each representing 50 students. Which pictograph do you find more informative?

Answer:

The second pictograph is more informative

NCERT class 6 maths chapter 9 data handling exercise 9.3

Question:1 The bar graph given alongside shows the amount of wheat purchased by government during the year 1998-2002 . Read the bar graph and write down your observations. In which year was

(a) the wheat production maximum?

(b) the wheat production minimum?

Answer: (a) In 2002 the wheat production maximum.

(b) In 1998 the wheat production minimum.

Question: 2 Observe this bar graph which is showing the sale of shirts in a ready made shop from Monday to Saturday.

Now answer the following questions :

(a) What information does the above bar graph give?

(b) What is the scale chosen on the horizontal line representing number of shirts?

(c) On which day were the maximum number of shirts sold? How many shirts were sold on that day?

(d) On which day were the minimum number of shirts sold?

(e) How many shirts were sold on Thursday?

Answer: (a) The bar graph is showing the sale of shirts in a ready-made shop from Monday to Saturday.

(b) 1 unit = 5 shirts.

(c) On Saturday the maximum number of shirts sold. 60 shirts were sold on Saturday.

(d) On Tuesday the minimum number of shirts were sold.

(e) 35 shirts were sold on Thursday.

Question: 3 Observe this bar graph which shows the marks obtained by Aziz in half-yearly examination in different subjects. Answer the given questions.

(a) What information does the bar graph give?

(b) Name the subject in which Aziz scored maximum marks.

(c) Name the subject in which he has scored minimum marks.

(d) State the name of the subjects and marks obtained in each of them.

Answer:(a) This bar graph shows the marks obtained by Aziz in half-yearly examination in different subjects.

(b) Aziz scored maximum marks in Hindi.

(c) Aziz scored minimum marks in Social Science.

(d) ) Hindi – 80, English – 60, Mathematics – 70, Science – 50 and Social Studies – 40.

NCERT Class 6 maths chapter 9 data handling exercise 9.4

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:

Reading storybooks is preferred by most of the students other than playing.

Question: 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.

Answer: Using the above-given information the following bar graph has been drawn

The scale is 1 unit = 10 books.

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

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?

Answer: The following bar graph illustrates the above-given data:

(a) In 2002 the maximum number of bicycles were manufactured.
(b) In 1999 the minimum number of bicycles were manufactured.

Question:4 Number of persons in various age groups in a town is given in the following table.

Age group (in years)

\small 1-14

\small 15-29

\small 30-44

\small 45-59

\small 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 \small = 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: Following bar graph represents the above given informatio

(a) The age groups 30 - 44 and 45 - 59 have the same population.

(b) People in the age group 60 - 74 = 80,000

People whare 75 and above = 40,000

Total number of senior citizens in the town = 80,000 + 40,000 = 1,20,000

Chapter No. Chapter Name
Chapter 1 NCERT Solutions for class 6 maths chapter 1 Knowing Our Numbers
Chapter 2 NCERT solutions for class 6 maths chapter 2 Whole Numbers
Chapter 3 NCERT solutions for class 6 maths chapter 3 Playing with Numbers
Chapter 4 NCERT Solutions for class 6 maths chapter 4 Basic Geometrical Ideas
Chapter 5 NCERT solutions for class 6 maths chapter 5 Understanding Elementary Shapes
Chapter 6 NCERT solutions for class 6 maths chapter 6 Integers
Chapter 7 NCERT Solutions for class 6 maths chapter 7 Fractions
Chapter 8 NCERT solutions for class 6 maths chapter 8 Decimals
Chapter 9 NCERT solutions for class 6 maths chapter 9 Data Handling
Chapter 10 NCERT solutions for class 6 maths chapter 10 Mensuration
Chapter 11 NCERT Solutions for class 6 maths chapter 11 Algebra
Chapter 12 NCERT solutions for class 6 maths chapter 12 Ratio and Proportion
Chapter 13 NCERT solutions for class 6 maths chapter 13 Symmetry
Chapter 14 NCERT Solutions for class 6 maths chapter 14 Practical Geometry

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NCERT Solutions for Class 6 Maths Chapter 9 Data Handling
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