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WAEC Mathematics 2004 Question 8

Question 8

Probability

There are m boys and 12 girls in a class. What is the probability of selecting at random a girl from the class?

  1. A.m/12
  2. B.12/m
  3. C.12/(m + 12)
  4. D.12/(m + 12)
Show the answer and explanation

Answer: C (12/(m + 12))

Explanation

There are m + 12 pupils, 12 of them girls: probability = 12/(m + 12).