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OpenStudy (anonymous):
A bag contains 12 red marbles, 5 yellow, and 15 green marbles. How many additional red marbles must be added to the 32 marbles already in the bag so that the probability of randomly drawing a red marble is 3/5?
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OpenStudy (anonymous):
Again the possible answers are: 13, 18, 28, 32, & 40
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