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WAEC Further Mathematics 2011 Question 25

Question 25

Probability

The probability that Kofi and Ama hit a target in a shooting competition are 1/6 and 1/9 respectively. What is the probability that only one of them will hit the target?

  1. A.1/54
  2. B.13/54
  3. C.20/27
  4. D.41/64
Show the answer and explanation

Answer: B (13/54)

Explanation

P(only Kofi) + P(only Ama) = (1/6)(8/9) + (5/6)(1/9) = 8/54 + 5/54 = 13/54.