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OpenStudy (anonymous):
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OpenStudy (anonymous):
In total there are 20 marbles, and 7 of them are green. The probability of getting a green on the first pick is 7/20 The probability of getting a green on the second pick is 6/19 *notice that the green balls have been reduced by 1, and the total number of balls as well. So the probability is (7/20)x(6/19)
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