Решение задачи N3672 теория вероятностей полная вероятн

3672. Three machines produce the same parts. Their productivity is 2: 3: 5, and standard parts among their products are on average 96%, 97%, 99%, respectively. Find the probability that a part taken at random from an unsorted batch of parts will be non-standard.

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