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OpenStudy (anonymous):
Two marbles are drawn without replacement from a box with 3 white, 2 green, 2 red, and 1 blue marble. Find the probability. The second marble is white given the first marble is blue.
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OpenStudy (anonymous):
use baye's theorem of total probability
OpenStudy (kropot72):
After the white marble is drawn there are 7 marbles remaining. The probability of drawing a green marble is\[\frac{2}{7}\]What will be the probability of drawing a white marble?
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