Solution of problem N4627 Poisson probability theory

Solution of problem N4627 Poisson probability theory

4627. Radio equipment consists of 1000 parts, each of which can fail during the day 0.002 and does not depend on the state of other elements. Find the probability of failure during the day:
a) only two elements;
b) at least two elements;

Additional information:

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

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