3rd Class Mathematics Data Handling

                                                                 Data Handling

Introduction

Pictograph is referred as the representation of data in picture form. In ancient time pictograph was the method for writing the information. Numbers were also represented in picture form.

Pictograph and Its Use

Information about anything in the form of picture is called pictograph. There are different types of graphs which are used for the representation of data. These are bar graph, line graph, Venn diagram.

A picture of a house represents one house.

Pictures of two house represent 2 house.

If one picture of a house represents 6 house then

The pictures of 2 house will represent \[6\times 2=12\]houses.

• Example

Cricket match played by Australia during the year 1998:

Cricket match played by India during the year 1998:

Cricket match played by South Africa during the year 1998:   

Which one country played maximum match during the year 1998?

(a) India                                    (b) Australia

(c) South Africa              (d) All of these

(e) None of these

Answer (a)

Explanation: There are more balls in front of India.

Representation of Information Using Pictograph

Following are the distribution of students in different sections in a school:

Representation of above information in picture form is as follows:

Scale: 15 boys =

From the above pictograph following information is obtained:

There are \[15\times 4=60\]Students in section A.

\[15\times 5=75\]Students are there in section B.

\[15\times 3=45\]Students are there in section C.

\[15\times 2=30\]Students are there in section D.

• Example

There are 30 students in class 2 and 40 students in class 3. A teacher represents the above information as follows:

Total students in class 2 =

Total students in class 3 =

How many students are represented by a symbol of?

(a) 10                                        (b) 20

(c) 30                                         (d) 40

(e) None of these

Answer (a)

Explanation: 3 bags represents 30 students so 1 bag represents 10 students.