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OpenStudy (anonymous):
A box contains blue marbles, green marbles, and pink marbles. The number of blue marbles is 5 times the combined number of green and pink marbles. If one marble were drawn at random, the probability of selecting a green marble would be twice as much as selecting a pink marble. If there are 15 blue marbles, what is the total number of marbles in the box?
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OpenStudy (anonymous):
A) 3 B) 18 C) 21 D) 78 E) 20
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