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WAEC Mathematics 1997 Question 50

Question 50

Probability

A bag contains 3 white, 6 red 5 blue identical balls. A ball is picked at random from the bag. What is the probability that it is either white or blue?

  1. A.9/14
  2. B.4/7
  3. C.3/7
  4. D.5/14
  5. E.3/14.
Show the answer and explanation

Answer: B (4/7)

Explanation

There are 14 balls, 3 + 5 = 8 of them white or blue: 8/14 = 4/7.