Determine the probability of having a utility bill


The monthly utility bills are normally distributed with mean value of $150 and standard deviation of $20.

(a) Determine the probability of having a utility bill between 135 and 170.

(b) Determine the probability of having a utility bill less than $135.

(c) Determine the probability of having a utility bill more than $180.

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Basic Statistics: Determine the probability of having a utility bill
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