SOLUTION: The weights of books on a library shelf are normally distributed with a mean of 2.8 pounds and a standard deviation of 0.6 pound. Approximately what percent of the books weigh more

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Question 931802: The weights of books on a library shelf are normally distributed with a mean of 2.8 pounds and a standard deviation of 0.6 pound. Approximately what percent of the books weigh more than 3.5 pounds?
A. 12%
B. 17%
C. 25%
D. 38%
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
mean = 2.8 pounds and SD = 0.6 pound. z+=+blue%28x+-+2.8%29%2Fblue%28.6%29
.........
p(x ≥ 3.5) = p(z > .7/.6)) = normalcdf(7/6, 100) = .1217 0r 12.17%