Решение задачи N1936 теория вероятностей Лапласа

1936. An encoded message of 1100 characters is sent. The probability of error when decoding each character is 0.01. Assuming the decoding of each symbol is independent, find the probability that the number of errors in the received message does not exceed 20.

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