Решение задачи N1051 теория вероятностей Лапласа

1051. 200 machines work independently of each other, and the probability of uninterrupted operation of each of them during the shift is 0.7. Find the probability that during the shift they will work without fail: a) 150 machines; b) from 130 to 150 machines.

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