Solution of problem N2988 probability theory

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Uploaded: 29.10.2018
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2988. In the group there are 3 excellent students, 4 horoshistas and 5 troechnik. The dean´s office selected 3 students from the group for duty at the exhibition, and the selection was made randomly. Find the probability that among the selected students:
a) all excellent students;
b) at least one is good;
c) exactly two troechnik.

Additional information

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

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