Question

A class teacher has the following absentees record of 30 students of a class. Number of days | 0 – 4 | 4 – 8 | 8 – 12 | 12 – 16 | 16 – 20 | 20 – 24 Number of Absent students | 1 | 8 | x | 6 | 5 | y If the mean number of days a student was absent is 12, find the values of x and y.

Find 'mean' and 'mode' of the following data :

The mean of the following distribution is

Assertion (A): The arithmetic mean of the following given frequency distribution table is 13.81. Reason (R): Mean = ∑fx / ∑f