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    Question

    A bag contains 6 balls of which 3 are red and 3 are

    black. They are drawn successively without replacement. What is the probability that colors are alternate?
    A 1/10 Correct Answer Incorrect Answer
    B 1/20 Correct Answer Incorrect Answer
    C 1/5 Correct Answer Incorrect Answer
    D None of these Correct Answer Incorrect Answer

    Solution

    We can choose balls as black, red or red black alternately, Required probability = 2 ร— (3/6 ร— 3/5 ร— 2/4 ร— 2/3 ร— 1/2 ร— 1) = 1/10

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