Question

In the frequency distribution.
Class intervals Frequencies
0 –10 5
10 – 20 15
20 – 30 10
30 – 40 2
40 – 50 3
What is the cumulative frequency corresponding to class 40 – 50?

Answer 1

do CUMMULATIVE FREQUENCY BY ADDING THE FREQUENCY ACCORDING TO CLASS INTERVALS

Answer 2

the cumulative frequency corresponding to class 40-50 is 35