The time taken by 70 students to solve a puzzle is recorded in the following table. Find the median class.

10-15

To find the median class:

First add the total number of frequencies.

Here, f=70

=(Total number of frequency/)2

=(70)/2 = 35

Hence, the value 35 lies in the class interval 10-15 from the cummulative frequency table.

The correct answer is option (2) : 10-15