Mathematics, 26.03.2022 05:50 alyssagibson470

the monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $15. Find the probability that a randomly selected utility bill is (a) less than $68, (b) between $81 and $90, and (c) more than $120.

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the monthly utility bills in a city are normally distributed, with a mean of $100 and a standard dev...