Решение задачи N737 теория вероятностей Лапласа

737. In each of the 750 independent tests, event A occurs with a constant probability of 0.45. Find the probability that event A occurs:
a) exactly 320 times;
b) less than 320 and more than 275 times;
c) more than 320 times.

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