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OpenStudy (anonymous):
Dillon has a bag of marbles. There are 4 blue, 1 green, 1 white, 3 black, and some red marbles in the bag. If the probability of pulling out a red marble is 3/4, how many red marbles are in the bag?
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OpenStudy (anonymous):
\[\frac{x}{9+x}=\frac{3}{4}\]
OpenStudy (anonymous):
i think its 27 total red marbles??
OpenStudy (anonymous):
27 marbles
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