The blood groups of 30 students of class VIII are recoded 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.
Here 9 students have blood groups A, 6 has B, 3 has AB and 12 has O.
Blood group | No. of students |
A | 9 |
B | 6 |
AB | 3 |
O | 12 |
Total = 30 |
As 12 students have the blood group O and 3 have their blood group AB. Clearly, the most common blood among these students is O and the rarest blood group among these students is AB.