The monthly utility bills in a city are normally​ distributed, with a mean of $100 and a standard deviation of ​$13. Find the probability that a randomly selected utility bill is​ (a) less...


The monthly utility bills in a city are normally​ distributed, with a mean of $100 and a standard deviation of ​$13.


Find the probability that a randomly selected utility bill is​ (a) less than $69​, (b) between ​$87 and ​$100​,and​ (c) more than ​$130.



Jun 01, 2022
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