3789. The box contains 4 parts belonging to workshop No. 1, 5 parts — workshop No. 2, and 4 parts — workshop No. 3. The probability that a part will be defective for workshop No. 1 is 0.08, for workshop No. 2 - 0 , 1, and shop number 3 produces 7% of the marriage. At random, the Quality Control Department selects the part to be checked, find the probability that it will be standard.

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