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22 March, 19:04

A bag contains 4 red marbles, 6 blue marbles and 7 green marbles. If three marbles are drawn out of the bag, what is the probability, to the nearest 1000th, that all three marbles drawn will be green?

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  1. 22 March, 19:14
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    Step-by-step explanation:

    Total marble = 4+6+7 = 17

    Number of green = 7

    Prob (1st green) = 7/17

    Now their are 6 green left and 16 marble

    Prob (2nd green) = 6/16 = 3/8

    Now their are 5 green left and 15 marble

    Prob (3rd green) = 5/15 = 1/3

    Prob (1st and 2nd and 3rd green) will be = 7/17 * 3/8 * 1/3

    = 7 / (17*8)

    = 7/136
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