Solution of problem N328 Laplace probability theory

Solution of problem N328 Laplace probability theory

328. The probability of returning a consumer loan on time to each of the 110 borrowers is on average 0,8. Find the probability that the loan will be returned by the appointed time:
A) at least 70 people and not more than 95 people;
B) at least 95 people;
C) not more than 94 people.

Additional information:

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