Solution of problem N561 Laplace probability theory

Solution of problem N561 Laplace probability theory

561. The probability of obtaining a prize-free ticket is 0,1. What is the probability that among the 400 randomly purchased tickets are not less than 50 and not more than 60 lossless ones?

Additional information:

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

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