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Solution of problem N4550 probability theory
4550. There are 3 white and 9 black balls in the urn. One ball is taken out of the urn at random. What is the probability that the ball taken out turns 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
Massimo86
exceeds: