Решение задачи N3937 теория вероятностей полная вероятн

3937. The watches are made in 3 factories and go to the store. The first plant produces 40% of products, the second - 45%, the third - 15%. In the production of the first plant, 80% of hours rush, the second - 70%, the third - 90%. What is the probability that a purchased watch is in a hurry?

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