Solution of problem N1298 Poisson probability theory

Solution of problem N1298 Poisson probability theory

1298. The probability that any subscriber will call the switch within an hour is 0.01. The telephone exchange serves 780 subscribers. What is the probability that at least 4 subscribers will call within an hour?

Additional information:

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

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