Решение задачи N238 теория вероятностей Лапласа

238. The probability that a pair of shoes taken at random from the manufactured lot will be of the first grade is 0.7. Determine the likelihood that among the 2,100 pairs entering the control, the number of pairs of first-class shoes will be at least 1,000 and not more than 1,500.

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