1256. In a certain city, out of every 100 families 95 h

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1256. In a certain city, out of every 100 families 95 have refrigerators. Find the probability that of 500 randomly selected families have refrigerators: a) from 300 to 400 inclusive; b) exactly 450 families.

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

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