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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.
Solution
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
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