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OpenStudy (anonymous):
A bag contains 3 red marbles, 4 blue marbles, and 5 white marbles. What is the probability of pulling out first a red, then a blue marble if none are replaced 7/132 1/11 12/23 7/23
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OpenStudy (lucaz):
you have a total of 12 marbles, then the probability P(red) = 3/12
OpenStudy (lucaz):
now the total is 12-1red = 11, then the P(b) = 4/11
OpenStudy (lucaz):
multiply these probabilities 3/12 * 4/11
OpenStudy (lucaz):
@kbear6812
OpenStudy (anonymous):
OKAY IM CALCULATING
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OpenStudy (anonymous):
i got 1/11
OpenStudy (lucaz):
you got it right
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