Find the probability of having a utility bill more than $160


The monthly utility bills are normally distributed with a mean value of $130 and a standard deviation of $15.
(a) Find the probability of having a utility bill between 100 and 150.
(b) Find the probability of having a utility bill less than $90.
(c) Find the probability of having a utility bill more than $160

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Basic Statistics: Find the probability of having a utility bill more than $160
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