Решение задачи N1383 теория вероятностей Лапласа

1383. The airline knows that 7% of people pre-booking a ticket for a particular flight will not use it. If the airline sold 270 airplane tickets in which only 265 seats, then what is the probability that the seat will be available to any passenger who has an order and is planning to fly away.

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