Word Problems on Grouped data

(1) The blood group of 30 students of class v are recorded as follows.

Represent this data in a frequency distribution table. Which is the most common and which is the rarest, blood group among these students.

A, O, AB, O, A, B, O, A, A, AB, A, B, O, A, A, O, A, O, B, O, AB, B, O, B, O,B, O, O, AB, B.

Solution : First we arrange the data as,
A, A, A, A, A, A, A, A, , B, B, B, B, B, B, B, O, O, O, O, O, O, O, O, O, O, O, AB, AB, AB, AB.

The blood group of 30 students of the class v can be represented in a table as follows,

We can observed that the 11 is maximum number of students have most common blood group is ‘O’ 

and 4 is minimum number of students have most common blood group is ‘AB ‘.