Решение задачи N692 теория вероятностей Лапласа

692. The probability that the web of a tarantula spider will withstand a weight of 200 g is equal to 0.8. Find the probability that among the spider webs taken from 400 spiders, the number of those who passed the test will not exceed 320.

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