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WAEC Mathematics 2020 Question 39

Question 39

Probability

A box contains 12 identical balls of which 5 are red, 4 blue and the rest are green. If a ball is selected at random from the box, what is the probability that it is green?

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

Answer: D (1/4)

Explanation

There are 12 − 5 − 4 = 3 green balls, so P(green) = 3/12 = 1/4.