In a class of 40 students, 32 offer Mathematics, 24 offer...
In a class of 40 students, 32 offer Mathematics, 24 offer Physics and 4 offer neither Mathematics nor Physics. How many offer both Mathematics and Physics?
4
8
16
20
Correct answer is D
Let the number of people that offer both Mathematics and Physics = y
Then, (32−y)+y+(24−y)+4=40
60−y=40⟹y=20
∴ 20 students offer both Mathematics and Physics.
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