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WAEC Further Mathematics 2007 Question 19

Question 19

Probability

A bag contains 2 red and 4 green sweets of the same size and shape. Two boys pick a sweet each from the box, one after the other, without replacement. What is the probability that at least a sweet with a green wrapper is picked?

  1. A.1/5
  2. B.2/5
  3. C.8/15
  4. D.14/15
Show the answer and explanation

Answer: D (14/15)

Explanation

P(no green) = P(both red) = 2/6 × 1/5 = 1/15. So P(at least one green) = 1 − 1/15 = 14/15.