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 , 6 , 3 A as B as AB and as O.
So the table representing the data is as follows

Blood group	Number of students
A	9
B	8
AB	3
O	12
Total	30

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