Question 22

Out of the 60 students of a class, 29 took Mathematics, 32 took Biology and 8 took none of the two subjects. How many students took both Mathematics and Biology?

Solution

Number of students who took only Mathematics n(m) = 29

Number of students who took only biology n(b) = 32

Total number of students n(t) = 60

Total number of students of both mathematics and biology n(m $$\smile$$ b) = 60 - 8 = 52

Total number of students who took both = 32 + 29 - 52 = 9

Hence, option B is the correct answer.

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