Решение задачи N4624 теория вероятностей Пуассона

4624. Radio equipment consists of 1000 electrical elements. The probability of failure of one element within one year of operation is 0.001 and does not depend on the state of other elements. What is the probability of failure of two and at least two electrical elements per year?

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