Solution of problem N475 Laplace probability theory

Solution of problem N475 Laplace probability theory

475. The shop produces an average of 90% of the products of excellent quality. What is the probability that in a batch of 200 items will be:
1) 150 items of excellent quality;
2) more than 150 items of excellent quality.

Additional information:

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