Решение задачи N4215 теория вероятностей Лапласа

4215. It is established that a third of buyers when they visit a fashion store get their clothes. What is the probability that out of 150 visitors to the store: a) exactly 50 people will purchase the goods; b) from 100 to 120 people will purchase the goods?

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