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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 all the four bulbs are defective.

    2. A.

     62/63
    B.

    125/126
    C.

    1/63
    D.

     1/42

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    Answer : Option D

    Explanation :

    NA

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