Solution of problem N5107 probability theory

Solution of problem N5107 probability theory

5107. From a batch containing 20 products of the first grade and 5 products of the highest grade, the merchandiser selects 4 products at random. Find the probability that among them at least 3 products are of the highest grade.

Additional information:

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

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