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    Question

    A bag contains 7 white, 13 orange and 10 brown balls.

    Two balls are randomly drawn from the bag, what is the probability that a white and a brown ball are drawn?
    A 1/5 Correct Answer Incorrect Answer
    B 7/31 Correct Answer Incorrect Answer
    C 2/13 Correct Answer Incorrect Answer
    D 5/18 Correct Answer Incorrect Answer
    E 3/20 Correct Answer Incorrect Answer

    Solution

    The probability that a white and a brown ball are drawn = (7C1 ├Ч 10C1)/30C2 = (7 ├Ч 10) / 435 = 70 / 435 = 2/13

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