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    Question

    A bag contains 10 black, 8 red and 12 yellow balls. Two

    balls are randomly drawn from the bag, what is the probability that a red and a yellow ball are drawn?
    A 3/14 Correct Answer Incorrect Answer
    B 7/31 Correct Answer Incorrect Answer
    C 32/145 Correct Answer Incorrect Answer
    D 5/21 Correct Answer Incorrect Answer
    E 6/25 Correct Answer Incorrect Answer

    Solution

    The probability that a red and a yellow ball are drawn = (8C1 × 12C1) / 30C2 = (8 × 12) / 435 = 96 / 435 = 32/145

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