Solution of problem N1467 Laplace probability theory

Solution of problem N1467 Laplace probability theory

1467. The enterprise executes 70% of orders on time. What is the probability that of 200 orders will be fulfilled in time:
A) exactly 140 orders;
B) from 130 to 150 orders.

Additional information:

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