Question

In the following grouped frequency distribution table class marks are given. Find the greater than cumulative frequencies.

Answer 1

First of all we will take the sum of all the frequencies and write it corresponding to first class.
Then we will keep subtracting the frequencies of next classes to write the greater than frequencies for them.
Sum of all frequencies = 6 + 14 + 20 + 21 + 9 + 5 = 75
Greater than frequencies are as follows,


After simplification,