SOLUTION: The total amount being spent on personal calls in a month by employees of a company follows a normal distribution with a mean of $900 and a standard deviation of . Find the pro

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Question 204895: The total amount being spent on personal calls in a month by employees of a company follows a normal distribution with a mean of $900 and a standard deviation of . Find the probability that in a randomly selected month the amount spent on personal calls is less than $750.

A)

0.8333

B)

0.0013

C)

0.1667

D)

0.9987
i just need some ideas and tools to solve this one. i am so bad a t standard deviation! please!!! thankyou more than you know!!!

Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
The standard deviation is missing from your post.
Cheers,
Stan H.

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