Решение задачи N419 теория вероятностей Лапласа

419. The road transport company has 180 buses. The probability of reaching the line of each bus is 0.9. Find the probability of a normal operation of the company in the next day, if for this it is necessary to have at least 160 buses on the line, exactly 160 buses.

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