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# RD Sharma Solutions (Part - 2)- Ex-22.1, Data Handling I Collection Organisation Data, Class 7 Class 7 Notes | EduRev

## Class 7 : RD Sharma Solutions (Part - 2)- Ex-22.1, Data Handling I Collection Organisation Data, Class 7 Class 7 Notes | EduRev

The document RD Sharma Solutions (Part - 2)- Ex-22.1, Data Handling I Collection Organisation Data, Class 7 Class 7 Notes | EduRev is a part of the Class 7 Course RD Sharma Solutions for Class 7 Mathematics.
All you need of Class 7 at this link: Class 7

#### Question 7:

In a study of number of accidents per day, the observations for 30 days were obtained as follows:

Prepare a frequency distribution table.

Required frequency-distribution table:

 Number of Accidents Number of Days 0 2 1 3 2 6 3 3 4 4 5 6 6 6

#### Question 8:

Prepare a frequency table of the following ages (in years) of 30 students of class VIII in your school:

 13, 14, 13, 12, 14, 13, 14, 15, 13, 14, 13, 14, 16, 12, 14 13, 14, 15, 16, 13, 14, 13, 12, 17, 13, 12, 13, 13, 13, 14

Frequency Distribution Table is :

 Ages (in years) Number of Students 12 4 13 12 14 9 15 2 16 2 17 1

#### Question 9:

Following figures relate the weekly wages (in Rs.) of 15 workers in a factory:

 300, 250, 200, 250, 200, 150, 350, 200, 250, 200, 150, 300, 150, 200, 250

Prepare a frequency table.
(i) What is the range in wages (in Rs)?
(ii) How many Workers are getting Rs 350?
(iii) How many workers are getting the minimum wages?

Frequency Distribution Table is

 Wages (in Rs.) No. of Workers 150 3 200 5 250 4 300 2 350 1

(i) The range in wages (in Rs.) = 350 -150 = 200.
(ii) Only 1 worker is getting Rs. 350.
(iii) 3 workers are getting the minimum wages, i.e, Rs. 150.

#### Question 10:

Construct a frequency distribution table for the following marks obtained by 25 students in a history test in class VI of a school:

 9, 17, 12, 20, 9, 18, 25, 17, 19, 9, 12, 9, 12, 18, 17, 19, 20, 25, 9, 12, 17, 19, 19, 20, 9

(i) What is the range of marks?
(ii) What is the highest mark?
(iii) Which mark is occurring more frequently?

Required frequency-distribution table:

 Marks Frequency 9 6 12 4 17 4 18 2 19 4 20 3 25 2

(i) Range of marks: 25-9=16.
(ii) The highest mark is 25.
(iii) 9 is occurring most frequently.

#### Question 11:

In a mathematis test following marks were obtained by 40 students of class VI. Arrange these marks in a table using, tally marks.

(i) Find how many students obtained marks equal to or more than 7?
(ii) How many students obtaned marks below 4?

The Frequency Distribution Table is :

 Marks Tally Marks Frequency 1 II 2 2 III 3 3 III 3 4 7 5 6 6 7 7 5 8 IIII 4 9 III 3

(i) 12 students obtained marks equal to or more than 7.
(ii) Only 8 students obtained marks below 4.

#### Question 12:

(i) Arrange the names of sweets in a table using tally marks.
(ii) Which sweet is preferred by most of the students.

(ii) Ladoo is preferred by most of the students, 12 students.

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