Given below is a cumulative frequency distribution showing the mars secured by 50 students of a class

From the frequency distribution table for the data.

Explanation

Here, we observet that, 17 students have scored marks below 20 i.e. it lies between class interval 0-20 and 22 students have scored marks below 40m so 22-17=5 students lies in the class interval 20-40 continuting in the same manner, we get complete frequency distribution table for given data.