Solution of problem N1173 Laplace probability theory

Solution of problem N1173 Laplace probability theory

1173. The probability that a shop buyer needs shoes of the 36th size is 0.3. What is the probability that among the 500 buyers the proportion of those needing shoes of the 36th size deviates from the probability of 0.3 by no more than 0.04 (in absolute value)?

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