Решение задачи N1048 теория вероятностей Лапласа

1048. 100 machines work independently of each other, and the probability of uninterrupted operation of each of them during the shift is 0.6. Find the probability that during the shift the operation will be uninterrupted: a) 70 machines; b) from 50 to 70 machines.

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