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OpenStudy (anonymous):
A bag contains 4 white marbles, 3 black marbles, and 5 red marbles. Find the probability of picking a red marble
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OpenStudy (turingtest):
assuming all marbles are equally likely, the probability of picking a red marble is\[{\text{number of red marbles}\over\text{total number of marbles}}\]
OpenStudy (anonymous):
Probability is red divided total marbles. 5 of 12.
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