SOLUTION: If outstanding student loans at a bank have a mean of $845 and a standard deviation of $270, what percent owe more than $750? (Hint: You need to subtract the percent from 100%).

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Question 324890: If outstanding student loans at a bank have a mean of $845 and a standard deviation of $270, what percent owe more than $750? (Hint: You need to subtract the percent from 100%).
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Find the z score.
z=%28x-mu%29%2Fsigma=%28750-845%29%2F270
z=-0.352
P%28z%29=0.3625
This probability is the cumulative area up to $750.
Since the total probability equals 1 (100%) subtract from 1 to get the correct probability (>$750).
P%28x%3E750%29=1-0.3625=0.6375 or 63.75%