SOLUTION: Average price of book$75 and s.d is $15 . Find what percent of the math book cost more than $79

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Question 807675: Average price of book$75 and s.d is $15 . Find what percent of the math book cost more than $79
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Average price of book$75 and s.d is $15 . Find what percent of the math book cost more than $79
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z(79) = (79-75)/15 = 4/15
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P(x > 79) = P(z > 4/15) = normalcdf(4/15,100) = 0.3949
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Cheers,
Stan H.
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