A bag contains 3 white, 6 red, 5 blue identical balls. A ball is picked…

Mathematics WAEC 1997

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

  • 9/14
  • 4/7 checkmark
  • 3/7
  • 5/14
  • 3/14

The correct answer is: B

Explanation

P(W or B) = 3/14 + 5/14 = 4/7
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