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.
Given:
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.
To do:
We have to represent this data in the form of a frequency distribution table and out which is the most common and which is the rarest blood group among these students.
Solution:
The required frequency distribution is:
Blood group | Tally marks | Number of students |
A | |||| ||||
| 9 |
B | |||| | | 6 |
AB | ||| | 3 |
O | |||| |||| ||
| 12 |
Total |
| 30 |
The most common blood group is $O$ and the rarest blood group is $AB$.
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