(5.3) - 6

The monthly utility bills in a city are normally distributed, with a mean of

$100

and a standard deviation of

$12.

Find the probability that a randomly selected utility bill is (a) less than

$70,

(b) between

$87

and

$100,

and (c) more than

$130.

Question content area bottom

Part 1

(a) The probability that a randomly selected utility bill is less than

$70

is

0.00620.0062.

(Round to four decimal places as needed.)

Part 2

(b) The probability that a randomly selected utility bill is between

$87

and

$100

is

enter your response here.

(Round to four decimal places as needed.)