NCERT Workbook Solutions For Class 3 Chapter 8 Data Handling

NCERT Workbook Solutions For Class 3 Chapter 8 Chapter 8 Data Handling

Concept Review Introduction

Any Data Is Collected Based On The Information. Data Collection Involves Collecting Data, Organizing, Or Tabulating Data And Data Representation. There Are Many Ways To Arrange Data In Pictograph, Bar Graph, Etc.

• Interpreting Data From Pictorial Representation Helps In Understanding Information. Pictograph Represents Numbers In The Form Of Pictures.
• They Are Used To Compare Data. Pictographs Are Often Used In Newspapers And Magazines. Bar Graph Uses Vertical Or Horizontal Bars To Represent Data.

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NCERT Workbook Solutions For Class 3 Chapter 8 Data Handling Data Collection And Organisation

Data

Data is A Collection Of Information. It is Gathered On The Basis Of Requirements. There Are Different Methods Of Collecting Data Such As By Observation, By Asking questions, or through measurements. the information can be represented in the form of the following:

• Facts: Vegetables grown in a particular region.
• Numbers: Marks of students in an exam.
• Measurements: Height of mountains of the world

Collection and Tabulation of Data

Data can be collected from different sources.

The Following Data Was Collected By A Group Of Students For A School Project. They Asked 30 People About Their Favourite Sport And Organized The Data.

We Use Tally Marking For Counting The Numbers. Lt Is A Representation Of Set Of Five Lines.

Every line | represents the number 1 and every fifth line is a diagonal line that represent number.

NCERT Workbook Solutions For Class 3 Chapter 8 Data Handling Data Collection And Organisation

Question 1. Choose the correct alternative

1. Identify the number represented by the tally mark

1. 11
2. 21
3. 13
4. 9

Answer: 1. 11

2. The number of triangles in the shape will be represented in tally mark as

Answer: 3.

3. The marks scored by a student in his test was identify the number

1. 37
2. 32
3. 42
4. 17

Answer: 4. 17

Study The Table That Represents The Number Of Medals Won By Kids In The Sports Organized In The School Premises.

Organizing And Tabulating The Collected Data, Makes It Easy For Us To Understand The Information

5. Difference between medals won by Rajan and Rahul in tally marks

Answer: 3.

6. are the medals won by _____

1. Rajshri
2. Pradeep
3. Poonam
4. Rajan

Answer: 3. Poonam

Question 2.  Match the Column-1 with Column-2

1. Match the columns and select the correct option.

represents 10 numbers and represents 5 numbers.

1. 1 → (D), 2 → (A), 3 → (B), 4 → (E), 5 → (C)
2. 1 → (C), 2 → (E), 3 → (A), 4 → (B), 5 → (D)
3. 1 → (E), 2 → (A), 3 → (D), 4 → (B), 5 → (C)
4. 1 → (B), 2 → (D), 3 → (A), 4 → (E), 5 → (C)

Answer: 1 → (D), 2 → (A), 3 → (B), 4 → (E), 5 → (C)

Question 3. State Whether The Following Statements Are True Or False.

Observe The Pictograph And Answer The Questions.

A Baker Recorded The Number of Customers Who Came To His Shop In A Particular Week.

1. The total customers who did not make any purchase in the week is

Answer: False

2. Number of people who purchased on Monday and Thursday are same as
Answer: True

3. Number of people who purchased on Wednesday, in tally mark is
Answer: False

4. Number of people who did not make any purchase on Tuesday is similar to the people who purchased on Friday.
Answer: True

Question 4. Activity Corner

The students in class recorded the lengths of their shoes to the nearest centimetre and make a tally chart. How many more shoes were 18 and 22 centimetres long combined than 20 centimetres long?

NCERT Workbook Solutions For Class 3 Chapter 8 Data Handling Representing Data: Pictograph And Bar graph

Pictograph

A pictograph is used to convey information of data using pictures and symbols. There are 4 details in a pictograph, the title of the data, label, symbol and key.

Title: Favourite game among 30 people

Here the label is the name of games and symbol is the circle.

Bar Graph

A bar graph uses bars to compare and represent data of a given information. Given below is the bar graph for the data collected by the students, to understand the favourite game among 30 people. The length of the bars represent the number of people.

From the above table we can answer the questions like,

• Which is the most popular game liked by the group – Cricket
• Which is the game of least preferred by the group – Tennis

Interpreting Pictograph

Example:

Number of books sold in a shop in a particular week.

1. How many books in total we sold in the week?
2. ln which days were least and most books sold?

Answer:

1. Total number of books sold = 15 × 5 = 75 Books
2. No book was sold on Friday and a maximum of 5 × 5 = 25 books were sold on Saturday.

Interpreting Bar Graph

Example.

A data is collected for the fruits preferred by students of a class.

1. Which is the fruit preferred by most of the kids?
2. How many kids preferred banana?
3. How many kids liked apple?

Answer:

1. Oranges = 6
2. Banana = 2
3. Apple = 4

Points to remember for handling data

• Understand the need for collecting a particular data.
• Read the data carefully.
• Organize the collected data in a table.
• Carefully analyze and interpret the data.
• pictographs and bargraphs can be done only with the help of tabulated data.
• Use a pictograph to represent small data and a bar graph to represent large data.
• Understand and interpret pictographs and bar graphs correctly using the keys.
• Organized data helps us to,
• Answer relevant questions
• Evaluate outcomes and
• Make predictions about future trends.

NCERT Workbook Solutions For Class 3 Chapter 8 Data Handling Representing Data: Pictograph And Bar Graph

Question 1.  Choose the correct alternative.

1. If each represents 2 players, identify the number of players given by

1. 3
2. 13
3. 6
4. 12

Answer: 4. 12

2. The score of 10 students in a test is recorded as 77, 100, 54, 92, 100, 63, 99, 100, 54,70. Number of students who got the highest and lowest scores are

1. 3,2
2. 2,3
3. 1,3
4. 3,1

Answer: 1. 3, 2

3. If each  stands for 10 trees. How many trees are there in the mango and orange orchard?

1. 8,5
2. 80,50
3. 40,25
4. 16, 10

Answer: 2. 80, 50

Observe the following pictograph and answer the questions 4 and 5.

Key :  = 3 girls and = 3 boys

4. Number Of Girls And Boys Having Birthday In The Whole Quarter (One Quarter Of A Year Is 3 Months)

1. 6,3
2. 12,6
3. 24,12
4. 18 and 9

Answer: 1. 6, 3

5. ln which month does the maximum number of boys have birthday?

1. March
2. February
3. January
4. January and February

Answer: 1. March

Question 2. Match the Column-1 with Column-2

Match the following columns and select the correct option.

1. 1 → (D), 2 → (C),3 → (A), 4 → (B)
2. 1 → (B), 2 → (D), 3 → (A), 4 → (C)
3. 1 → (D), 2 → (A), 3 → (C),4 → (B)
4. 1 → (B), 2 → (D), 3 → (A), 4 → (C)

Answer: 4. 1 → (B), 2 → (D), 3 → (A), 4 → (C)

Question 3. State whether the following statements are true or false

Directions: Observe the bar graph that depicts information about colour preferences of people.

1. Orange and indigo are the least preferred colours. 
Answer: True

2. Difference between the number of people who preferred steel and indigo is 6.
Answer: False

3. The number of people who preferred indigo and steel are 8 and 12 respectively
Answer: True

4. A maximum of 12 people preferred the colour ‘sunny’.
Answer: False

5. Total number of people who participated in the survey were 42.
Answer: False

Question 4. Very Short Answer Type Questions.

Directions: Study the bar graph that shows variations in the lowest temperature in January in different years.

1. How many years are recorded in the graph?
Answer: 10 years are recorded in the graph

2. Which year the lowest temperature was 18°?
Answer: 2019 year the lowest temperature was 18°

3. Which year had the day with lowest temperature in the month of January and at what date?
Answer: 2013 year had the day with lowest temperature in the month of January and at 3rd.

Directions: Study the pictograph that shows the number of cars Mr. James repaired last week

Key represents 6 cars.

4.

1. How many cars did Mr. James repair on Monday?
2. On which day the maximum number of cars were repaired?

Answer:

1. Mr. James 18 cars repair on Monday

2. The maximum number of cars were repaired on Thursday

5.

1. Did he repair 30 cars on Wednesday ?
2. On which day Mr. James didn’t do any work?

Answer: 

1. Mr. James doesn’t repair 30 cars on Wednesday.

2. Mr. James didn’t work on Sunday

6.

1. How many cars did he repair on Friday and Saturday?
2. How much more cars did he repair on Thursday than Wednesday?

Answer:

1. Mr. James 48 cars repair on Friday and Saturday

2. Mr. James 30 cars repair on Thursday than Wednesday

Question 5. Short Answer Type Questions.

Directions: Study the given pictograph showing the number of correct answers marked by four students in Mathematics test.

Answer the following questions:

1. Which of the student will get maximum marks in the mathematics test?
Answer: Krishna got 40 Marks in the mathematics test.

3. What is the difference between the number of questions marked correctly by Krishna and Yamini?
Answer: 15 difference between the number of questions marked correctly by Krishna and Yamini