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a box contains 7 green marbles, 4 blue marbles, and 8 red marbles. three marbles are selected at random from the box, one at a time, without replacement. find the probability that the first two marbles selected are not red, and the last marble is red.

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i hope that this helps

goodluck :)

a box contains 7 green marbles, 4 blue marbles, and 8 red marbles. three marbles are-example-1
User Johan Donne
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