Решение задачи N3823 теория вероятностей полная вероятн

3823. Casting in blanks comes from two shops: 70% from the first shop and 30% from the second. At the same time, the material of the first workshop has 10% of defects, and the second - 20%. Find the probability that the random pig is free from defects.

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