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Solution of problem N2645 probability theory
2645. On the table are 30 examination tickets with numbers 1, 2, 3, ... 30. The teacher takes three any tickets. What is the probability that they are from the last four?
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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