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WAEC Further Mathematics 2010 Question 29

Question 29

Probability

Yomi was asked to label four seats with letter S, R, P, Q. What is the probability that he labelled them in alphabetical order?

  1. A.1/24
  2. B.1/12
  3. C.1/6
  4. D.1/4
Show the answer and explanation

Answer: A (1/24)

Explanation

The four letters can be arranged in 4! = 24 ways and only one is alphabetical, so the probability is 1/24.