passpadi

2018

Mathematics

JAMB

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?

A.

4

B.

8

C.

16

D.

20

Correct Answer: 20

Explanation

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.

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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