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UI Post-UTME Mathematics 2025 (Model questions) Question 13

Question 13

Sets

In a class of 80 students, 42 offer Mathematics, 35 offer Physics and 18 offer both mathematics and physics. How many offer neither?

  1. A.21
  2. B.11
  3. C.25
  4. D.18
Show the answer and explanation

Answer: A (21)

Explanation

Number offering at least one = 42 + 35 − 18 = 59, so neither = 80 − 59 = 21.