Решение задачи N3666 теория вероятностей полная вероятн

3666. Three machines produce the same parts. Their productivity is 5: 3: 2, and standard parts among their products are on average 99%, 98%, 97%, respectively. Find the probability that a piece taken from an unassorted product at random will be non-standard.

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