SOLUTION: The number of months a group of teens have been studying French is normal distributed with a mean of 16 months and a standard deviation of 3 months. Approximately what percentage

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Question 939462: The number of months a group of teens have been studying French is normal distributed with a mean of 16 months and a standard deviation of 3 months.
Approximately what percentage (rounded to the nearest whole) of the teens have been taking French for between 10 to 19 months?

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
mean of 16 months and a standard deviation of 3 months.
z+=+blue%28x+-+16%29%2Fblue%283%29
P(10 < x < 19) = P(-6/3 < z < 3/3) = normalcdf(-2,1)