Решение задачи N5272 теория вероятностей

5272. A batch of 20 items contains 6 defective items. 5 products are selected from the batch for control. If there is more than 1 defective item among the control items, then the entire batch is rejected. What is the probability that a batch of products will be rejected?

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