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JAMB Mathematics 2020 Paper

Question : 36

Total: 40

Solution:

Concept:

Use the set theory formula for two overlapping groups.

Explanation:

Let

x

be the number of students who offer both mathematics and physics.

Students offering only mathematics:

32 - x

Students offering only physics:

24 - x

Students offering neither:

4

Total students:

(32 - x) + x + (24 - x) + 4 = 40

Simplify:

60 - x = 40

x = 20

Answer:

20 students offer both mathematics and physics.

Correct option: D. 20

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