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Solution of problem N4491 probability theory
4491. There are 6 white and 9 black balls in the urn. 2 balls are taken out of the urn at the same time. What is the probability that both balls will turn out to be black?
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)
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Discount for regular customers! If the total of your purchases from the seller
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