Solution of problem N1320 Poisson probability theory

Solution of problem N1320 Poisson probability theory

1320. Manufacturers of calculators know from experience that 1% of the calculators sold is defective. The audit firm bought 500 calculators. What is the probability of having to replace 4 calculators?

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

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