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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 $81 and $110, and (c) more than $130.
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Part 1
(a) The probability that a randomly selected utility bill is less than $69 is
0.0086.
(Round to four decimal places as needed.)
Part 2
(b) The probability that a randomly selected utility bill is between $81 and $110 is
enter your response here.
(Round to four decimal places as needed.)
Sagot :
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