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Discussion :: Probability

  1. A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that atleast one bulb is good.
    2. A.
    6/63
    B.
    2/63
    C.
    125/126
    D.
    1/126
    E.
    1/63

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    Answer : Option C

    Explanation :

    Required probability = 1 - 1/126 = 125/126

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