2784. There are 18 students in the group, among which 7

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2784. There are 18 students in the group, among which 7 students study at 4 and 5. According to the list, 7 students are selected. Find the probability that among the selected students 3 students study at 4 and 5.

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

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