Solution of problem N238 Laplace probability theory

Solution of problem N238 Laplace probability theory

238. The probability that a pair of shoes taken at random from the manufactured lot will be of the first grade is 0.7. Determine the likelihood that among the 2,100 pairs entering the control, the number of pairs of first-class shoes will be at least 1,000 and not more than 1,500.

Additional information:

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