SOLUTION: If X is a normal random variable with standard deviation 3.50, and if the probability that X is more than 10.83 is .1271, then what is the mean of X? Please work out solution so I

Question 429428: If X is a normal random variable with standard deviation 3.50, and if the probability that X is more than 10.83 is .1271, then what is the mean of X?
Please work out solution so I can see how the answer was achieved.
If X is a normal random variable with a standard deviation 3.50, and if the probability that X is less than 8.83 is .648, then what is the mean of X?
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
, or

==> , approximately, from a table of standard normal values.
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