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WAEC Mathematics 2025 Question 10

Question 10

Probability

In a class of 42 students, 21 offer History and 28 offer Government. If each student offers at least one of the two subjects, find the probability that a student selected at random from the class offers Government only.

  1. A.1/6
  2. B.1/3
  3. C.1/2
  4. D.3/4
Show the answer and explanation

Answer: C (1/2)

Explanation

Both subjects: 21 + 28 − 42 = 7. Government only: 28 − 7 = 21, so the probability is 21/42 = ½.