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30 September, 11:34

A box contains 5 blue chips and 11 red chips. a person selects two chips without replacement, find the probability of selecting 2 blue chips?

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  1. 30 September, 11:44
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    5 blue chips, 11 red chips ... total of 16 chips

    probability of first being blue = 5/16

    without replacement

    probability of 2nd being blue = 4/15

    probability of both : 5/16 * 4/15 = 20/240 reduces to 1/12
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