SOLUTION: The distribution of cholesterol levels in teenage boys is approximately normal with the mean of 170 and Sd =30. Levels above 200 warrant attention. Find the probability that a teen

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Question 375919: The distribution of cholesterol levels in teenage boys is approximately normal with the mean of 170 and Sd =30. Levels above 200 warrant attention. Find the probability that a teenage boy has a cholesterol level greater than 225.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
z=%28x-mu%29%2Fsigma
z=%28225-170%29%2F30
z=1.5
.
.
.
P%28x%3C=225%29=P%281.5%29
Find P(z).
Then
P%28x%3E225%29%2BP%28x%3C=225%29=1
P%28x%3E225%29=1-P%28x%3C=225%29
P%28x%3E255%29=1-P%281.5%29