In a frequency distribution with classes 0 - 10, 10 - 20 etc., the size of the class intervals is 10. The lower limit of fourth class is
(a) 40
(b) 50
(c) 20
(d) 30

Solution:

From the frequency distribution, we have the given classes 0 - 10 and 10 - 20

The size of the class can be calculated as the difference between any two lower limits or any two upper limits

Size of the class = 20 - 10 = 10

Third class would be 20 - 30 and fourth class would be 30 - 40

The lower limit is the lesser number in the class = 30

✦ Try This: In a frequency distribution with classes 0 - 20, 20 - 40 etc., the size of the class intervals is 10. The lower limit of third class is (a) 40, (b) 50, (c) 20, (d) 30

Given classes 0 - 20 and 20 - 40

The size of the class can be calculated as the difference between any two lower limits or any two upper limits

Size of the class = 20 - 0 = 20

Third class is 40 - 60

Hence, lower limit is 40.

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

NCERT Exemplar Class 8 Maths Chapter 2 Problem 14

In a frequency distribution with classes 0 - 10, 10 - 20 etc., the size of the class intervals is 10. The lower limit of fourth class is (a) 40, (b) 50, (c) 20, (d) 30

Summary:

In a frequency distribution with classes 0 - 10, 10 - 20 etc., the size of the class intervals is 10. The lower limit of fourth class is 30

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