Solution of problem N4628 Poisson probability theory

Solution of problem N4628 Poisson probability theory

4628. Radio equipment consists of 600 elements, the probability of failure of one element during the year is 0.005 and does not depend on the state of other elements. What is the probability of two elements failing in a year?

Additional information:

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

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