Решение задачи N1056 теория вероятностей Лапласа

1056. 500 machines work independently of each other, and the probability of uninterrupted operation of each of them during the shift is 0.8. Find the probability that during the shift, they will work without fail: a) 410 machines; b) from 390 to 410 machines.

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