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      Question

      A bag contains 3 red balls, 4 blue balls and 5 green

      balls. If two balls are drawn successively without replacement, what is the probability that one is red and the other is blue?
      A 4/19 Correct Answer Incorrect Answer
      B 2/11 Correct Answer Incorrect Answer
      C 7/17 Correct Answer Incorrect Answer
      D 3/22 Correct Answer Incorrect Answer

      Solution

      Total balls = 12 Probability of red then blue = 3/12 x 4/11 Probability of blue then red = 4/12 x 3/11 Total probability = 3/12 x 4/11 + 4/12 x 3/11 = 12/132 + 12/132 = 24/132 = 2/11

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