Решение задачи N5186 теория вероятностей

5186. There are 100 parts in a box, 18 of them are defective. 3 parts were taken at random. Find the probability that among the extracted parts
a) not married
b) only one defective
c) no more than 2 defective ones.

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