Question

Find the cumulative frequency for the class interval '20-25'

• A. 15
• B. 25
• C. 17
• D. 14

Answer 1

The correct option is B 25

We know that cumulative frequency is the sum of the frequencies of a class and all classes above it.

For the class interval '20 - 25' the cumulative frequency is = 25

Since the frequency of class interval '0 - 5' is 5, the frequency of class interval '5 - 10' is 2, the frequency of class interval '10 - 15' is 7, the frequency of class interval '15 - 20' is 6 and the frequency of class interval '20- 25' is 5,

cumulative frequency = 5+2+7+6+5 = 25