Solution of problem N495 Laplace probability theory

Solution of problem N495 Laplace probability theory

495. At the factory, a worker for a shift produces 399 products. The probability that the part will be of the first grade is 0.72. Find the probability that: a) details of the first grade will be 334 pieces b) details of the second grade will be at least 320 and not more than 366.

Additional information:

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