Решение задачи N1470 теория вероятностей Лапласа

1470. It is established that the consumer service enterprise performs on average 60% of orders on time. What is the probability that out of 150 orders accepted for some time will be fulfilled in time:
a) 90 orders; b) from 93 to 107 orders?

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