Question

The blood groups of 30 students of class VIII are recorded as follows:

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

Represent this data in the form of a frequency distribution table. Find out which is the most Common and which is the rarest blood group among these students.

Answer 1

Here 9 students have blood groups A as B ,6 ,3 as AB and as O.

So the table representing the data is as follows

As 12 students have the blood group O and 3 have their blood group is AB. Clearly, the most common blood group among these students is 0 and the rarest blood group among these students is 0 and the rarest blood group among these students is AB