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Multiple Choice Questions

A basket contains 6 White 4 Black 2 Pink and 3 Green balls If four balls are picked at random what i...........

Quantitative Aptitude ( CCS) Probability
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    A basket contains 6 White 4 Black 2 Pink and 3 Green balls. If four balls are picked at random, what is the probability that atleast one is Black?

    69/91

    Correct Answer

    80/91

    Incorrect Answer

    21/91

    Incorrect Answer

    55/91

    Incorrect Answer
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    Explanation:

    Answer & Explanation
    Answer – 69/91
    Explanation :
    Total Balls = 15
    Probability = 11C4/15C4 = 22/91
    One is black = 1 – 22/91 = 69/91

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