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Solution of problem N3278 probability theory
3278. In the urn there are 18 balls of the same size and appearance: 9 of them are white and 9 are black. 7 balls are taken at random (without returning to the urn). What is the probability that among them 4 will be white?
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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