Posted by Lesley on .
The average monthly mortgage payment including principal and interest is $982 in the United States. If the standard deviation is approximately $180 and the mortgage payments are approximately normally distributed, find the probability that a randomly selected monthly payment is:
a. More than $1000
b. More than $1475
c. Between $800 and $1150

Math 
Reiny,
Time for one of my favourite webpages
http://davidmlane.com/normal.html
just plug in