The monthly utility bills in a city are normally​ distributed, with a mean of ​$100 and a standard deviation of ​$16. Find the probability that a randomly selected utility bill is​ (a) less than ​$70​, ​(b) between ​$85 and ​$110​, and​ (c) more than ​$130.       ​(a) The probability that a randomly selected utility bill is less than ​$70 is   ​(Round to four decimal places as​ needed.) ​(b) The probability that a randomly selected utility bill is between ​$85 and ​$110 is   ​(Round to four decimal places as​ needed.) ​(c) The probability that a randomly selected utility bill is more than ​$130 is

MATLAB: An Introduction with Applications
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The monthly utility bills in a city are normally​ distributed, with a mean of
​$100
and a standard deviation of
​$16.
Find the probability that a randomly selected utility bill is​ (a) less than
​$70​,
​(b) between
​$85
and
​$110​,
and​ (c) more than
​$130.
 
 
 
​(a) The probability that a randomly selected utility bill is less than
​$70
is
 
​(Round to four decimal places as​ needed.)
​(b) The probability that a randomly selected utility bill is between
​$85
and
​$110
is
 
​(Round to four decimal places as​ needed.)
​(c) The probability that a randomly selected utility bill is more than
​$130
is
 
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