Решение задачи N3760 теория вероятностей полная вероятн

3760. The assembly workshop receives parts from three production lines. The performance of these lines are 5: 3: 2. The probability of marriage for the 1st line is 0.01; for the 2nd line - 0.02; for the 3rd line - 0.03. Find the probability that a part taken at random is defective.

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