2645. On the table are 30 examination tickets with numb

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Uploaded: 15.10.2018
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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?

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Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)

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