Решение задачи N4718 теория вероятностей полиномиальный

4718. For each lottery ticket, with a probability of 0.05, a big win can fall, with a probability of 0.05, a small win, and with a probability of 0.9, the ticket can turn out to be without a win. Bought 14 tickets. Determine the probability of getting 2 big wins and 2 small ones.

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