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Old 10-24-2005, 01:07 AM
etizzle etizzle is offline
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Join Date: May 2004
Posts: 63
Default question for MIT probability class

thanks for any help


i've got 20 balls, 2 white, 8 red, 6 black, and 4 green. I have 4 distinguishable urns. The balls are placed randomly among the urns, and each urn can have any number of balls.

What is the probability that no urn will contain both green and black balls?
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