Решение задачи N3908 теория вероятностей полная вероятн

3908. At the enterprise manufacturing the windows, the first workshop produces 30%, the second 20%, and the third 50% of all windows. Marriage is 3%, 2% and 4% respectively. What is the probability that a randomly selected window will be defective?

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