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Question

Blood group

Number of students

A

9

B

6

AB

3

O

12

Total

30

The above frequency distribution table represents the blood groups of 30 students of a class. Use this table to determine the probability that a student of this class, selected at random, has blood group AB.

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Solution

Number of students having blood group AB = 3

Total number of students = 30

Hence, required probability,


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