Решение задачи N2360 теория вероятностей Бернулли

2360. The communication channel is transmitted 6 messages. Each message is independently distorted with a probability of 0.3 distorted by interference. Find the probability of the event D = {no more than half of all transmitted messages will be distorted}.

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