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Discussion :: Probability

  1.  A box contains 20 electric bulbs, out of which 4 are defective. Two bulbs are chosen at random from this box. The probability that at least one of these is defective is

    2. A.

    4/19
    B.

    5/19
    C.

    6/19
    D.

    7/19

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    Answer : Option D

    Explanation :

    7/19

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