Решение задачи N1617 теория вероятностей Бернулли

1617. The player throws the rings on the peg. The probability of success is 0.1. Find the probability that of the six rings on the peg fall:
a) two rings;
b) at least two rings;
c) no more than two rings.

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