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A bag has 8 red marbles, 6 green marbles, 4 blue marbles, and 2 yellow marbles....

A bag has 8 red marbles, 6 green marbles, 4 blue marbles, and 2 yellow marbles. We draw three marbles, one at a time, with replacement. What is the probability that all three draws will be blue?

Write your answer as a simplified fraction.

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