Solution of problem N243 Laplace probability theory

Solution of problem N243 Laplace probability theory

243. Suppose, on average, every third buyer requires a 42-size men´s footwear. What is the probability that out of 400 buyers, men´s shoes will need 42 sizes:
1) exactly 100 customers
2) from 150 to 200 buyers.

Additional information:

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

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