Решение задачи N3596 теория вероятностей

3596. In two batches of 81 and 37% of high-quality products, respectively. Randomly choose one product from each batch. What is the probability to find among them: a) at least one defective; b) two defective; c) one benign and one defective?

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