Решение задачи N1161 теория вероятностей Лапласа

1161. 400 samples of ore are to be examined. The probability of an industrial metal content in each sample is the same and equal to 0.8. Find the probability that the number of samples with an industrial metal content will be between 290 and 340.

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