Решение задачи N5293 теория вероятностей

5293. The warehouse received a batch of 50 parts, including 11 defective ones. 7 products are randomly selected from the batch for control. If there are more than 2 defective ones among the control ones, then the entire batch is rejected. Find the probability that the lot will be rejected.

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