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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