SOLUTION: An urn contains 6 red marbles and 4 black marbles. Two marbles are drawn without replacement from the urn. What is the probability that both of the marbles are black?

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Question 955662: An urn contains 6 red marbles and 4 black marbles. Two marbles are drawn without replacement from the urn. What is the probability that both of the marbles are black?

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
An urn contains 6 red marbles and 4 black marbles. Two marbles are drawn without replacement from the urn. What is the probability that both of the marbles are black?
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# of ways to succeed: 4C2 = 6
# of possible pairs:: 10C2 = 45
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P(2 black) = 6/45 = 2/15
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Cheers,
Stan H.
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