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Solution of problem N4393 probability theory
4393. There are twelve balls in the box, three of them are black and nine are white. Two balls are taken out at random. Find the probability that the balls will be of different colors.
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: