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The amount of annual snowfall in the certain mountain range is normally distributed with the mean of 109 inches, and a standard deviation of 10 inches.   

a. Determine the probability that the mean annual snowfall throughout 40 randomly picked years will exceed 111.8 inches?     

b. Determine the probability that the mean annual snowfall throughout 40 randomly picked years will be between 105 inches and 112 inches?

Statistics and Probability, Statistics

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