The following data : 2, 5, 15, 25, 20, 12, 8, 7, 6, 16, 21,17, 30, 32, 23, 40, 51, 15, 2, 9, 57, 19, 25 is grouped in the classes 0 - 5, 5 - 10, 10 - 15 etc. Find the frequency of the class 20 - 25.
(a) 5
(b) 4
(c) 3
(d) 2

Solution:

Given data 2, 5, 15, 25, 20, 12, 8, 7, 6, 16, 21,17, 30, 32, 23, 40, 51, 15, 2, 9, 57, 19, 25

Numbers between 20 and 25 are 21,23,25

So, the frequency is 3

✦ Try This: The following data : 2, 5, 15, 25, 20, 12, 8, 7, 6, 16, 21,17, 30, 32, 23, 40, 51, 15, 2,

9, 57, 19, 25 are grouped in the classes 0 -5, 5 -10, 10 -15 etc. Find the frequency of the class 5-15

Numbers between 5 and 15 are 6,7,8,9,12.

Therefore, the frequency is 5

☛ Also Check: NCERT Solutions for Class 8 Maths Chapter 5

NCERT Exemplar Class 8 Maths Chapter 2 Sample Problem 2

The following data : 2, 5, 15, 25, 20, 12, 8, 7, 6, 16, 21,17, 30, 32, 23, 40, 51, 15, 2, 9, 57, 19, 25 is grouped in the classes 0 - 5, 5 - 10, 10 - 15 etc. Find the frequency of the class 20 - 25. (a) 5, (b) 4, (c) 3, (d) 2

Summary:

The following data : 2, 5, 15, 25, 20, 12, 8, 7, 6, 16, 21,17, 30, 32, 23, 40, 51, 15, 2, 9, 57, 19, 25 is grouped in the classes 0 -5, 5 -10, 10 -15 etc, then the frequency of the class 20 -25 is 3

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