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There are three black marbles and four red marbles in a bag, what is the probability that you will pick a black marble out of the bag?
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There are three black marbles and four red marbles in a bag, what is the probability that you will pick a black marble out of the bag?

User Benno
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So in total, there are 7 marbles, (3 black + 4 red = 7 total marbles) and we want to find out how much black marbles are able to come out. So it would be 3/7. :)
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User Smnh
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