Solution of problem N330 Laplace probability theory

Solution of problem N330 Laplace probability theory

330. The probability of returning a consumer loan on time to each of the 220 borrowers is on the average 0.95. Find the probability that the loan will be returned by the appointed time:
A) not less than 180 people and not more than 200 people;
B) not less than 200 people;
B) not more than 199 people.

Additional information:

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