Решение задачи N5273 теория вероятностей

5273. There are 5 defective items in a batch of 20 items. 7 products are selected from the batch for control. If there are more than three defective ones among the control ones, 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)