Решение задачи N5199 теория вероятностей

5199. From a batch containing 14 parts, among which 4 are defective, 7 parts are randomly selected. The batch will be recognized as suitable if among the selected parts there are 6 suitable ones. Find the probability that the lot will be accepted.

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