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WAEC Further Mathematics 2016 Question 34

Question 34

Probability

A box contains 14 white balls and 6 black balls. Find the probability of first drawing a black ball and then a white ball without replacement.

  1. A.0.21
  2. B.0.22
  3. C.0.30
  4. D.0.70
Show the answer and explanation

Answer: B (0.22)

Explanation

6/20 × 14/19 = 84/380 ≈ 0.22.