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14 February, 12:33

A bag contains 3 red marbles, 4 blue marbles and 5 green marbles. If two marbles are drawn out of the bag, what is the probability, to the nearest 1000th, that both marbles drawn will be red?

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  1. 14 February, 13:32
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    0.091

    Step-by-step explanation:

    So you have 12 marbles in all.

    If you take out 1, there is a 1 / 3 chance that it is red.

    If you take out the second one, there is a 3 / 11 chance it is red if the first one is red.

    1 / 3 * 3 / 11 = 1 / 11

    0.091
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