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      Question

      A box contains 8 green balls, 6 blue balls and 6 yellow

      balls. Two balls are drawn at random. What is the probability that at least one of them is yellow?
      A 17/38 Correct Answer Incorrect Answer
      B 91/190 Correct Answer Incorrect Answer
      C 93/190 Correct Answer Incorrect Answer
      D 99/190 Correct Answer Incorrect Answer
      E 89/190 Correct Answer Incorrect Answer

      Solution

      Total balls = 8 + 6 + 6 = 20
      Non-yellow balls = 8 + 6 = 14
      Required probability = 1 - Probability that none is yellow
      = 1 - (14/20) ├Ч (13/19)
      = 1 - (182/380)
      = 1 - (91/190)
      = 99/190

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