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4675. There are products of four grades, and the number of products of each grade is, respectively, 4, 3, 2, 3. For control, 6 products are taken at random. Determine the probability that among them 2 is a first-class item, 1 is a second-grade item, 2 is a third-grade item, and 1 is a fourth-grade item.
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)
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