Решение задачи N3788 теория вероятностей Байеса

3788. There are 200 parts in stock, of which 100 are manufactured by shop No. 1, 60 by shop No. 2 and 40 by shop No. 3. Shop number 1 produces 3% of defective parts, shop number 2 - 2%, shop number 3 - 1%. Randomly taken from stock item was defective. Find the probability that this item is made by shop №2.

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