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WAEC Mathematics 2022 Question 43

Question 43

Probability

A local community has two newspapers: the Morning Times and the Evening Dispatch. The Morning Times is read by 45% of households and the Evening Dispatch by 60%. If 20% of the households read both papers, find the probability that a particular household reads at least one paper.

  1. A.0.45
  2. B.0.65
  3. C.0.85
  4. D.0.95
Show the answer and explanation

Answer: C (0.85)

Explanation

P(at least one) = 0.45 + 0.60 − 0.20 = 0.85.