Question

Question No.81). In a frequency distribution with classes 0-15, 15-30, etc. The size of class - interval is 15. Then the upper limit of the fourth class is​

Answer 1

Explanation:

Given classes are 0-15, 15-30 ,...

Class size = 15

Therefore, The next classes will be

30-45,45-60,60-75,75-90,...

The fourth class = 45-60

The upper limit = 60.