Question 959063: Thanks to whoever takes the time to answer!
An urn contains five red balls, seven black balls, and three green balls. If two balls are selected at random without replacement from the urn, what is the probability that a red ball and a black ball will be selected? (Round your answer to three decimal places.)
My first answer of .167 was incorrect.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Thanks to whoever takes the time to answer!
An urn contains five red balls, seven black balls, and three green balls. If two balls are selected at random without replacement from the urn, what is the probability that a red ball and a black ball will be selected? (Round your answer to three decimal places.)
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# of black/red pairs:: 7*5 = 35
# of random pairs:: 15C2 = 105
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P(red/black) = 35/105 = 1/3
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Cheers,
Stan H.
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