Решение задачи N3820 теория вероятностей полная вероятн

3820. Casting in blanks comes from two preparation shops: 75% from the first and 25% from the second. At the same time, the material of the first workshop has 15% of defects, and the second - 20%. Find the probability that one random pig will be standard.

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