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

RD Sharma Solutions for Class 7 Mathematics

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.
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Question 7:

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

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

Prepare a frequency distribution table.

Answer 7:

Required frequency-distribution table:

Number of AccidentsNumber of Days
02
13
26
33
44
56
66

 

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

Answer 8:

Frequency Distribution Table is :

Ages (in years)Number of Students
124
1312
149
152
162
171

 

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?

Answer 9:

Frequency Distribution Table is

Wages (in Rs.)No. of Workers
1503
2005
2504
3002
3501


(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?

Answer 10:

Required frequency-distribution table:

MarksFrequency
96
124
174
182
194
203
252


(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.

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

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

Answer 11:

The Frequency Distribution Table is :

MarksTally MarksFrequency
1II2
2III3
3III3
4RD Sharma Solutions (Part - 2)- Ex-22.1, Data Handling I Collection Organisation Data, Class 7 Class 7 Notes | EduRev7
5RD Sharma Solutions (Part - 2)- Ex-22.1, Data Handling I Collection Organisation Data, Class 7 Class 7 Notes | EduRev6
6RD Sharma Solutions (Part - 2)- Ex-22.1, Data Handling I Collection Organisation Data, Class 7 Class 7 Notes | EduRev7
7RD Sharma Solutions (Part - 2)- Ex-22.1, Data Handling I Collection Organisation Data, Class 7 Class 7 Notes | EduRev5
8IIII4
9III3


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

Question 12:

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

Answer 12:

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

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

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