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    Standard Normal Distribution

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    The mean of a normal distribution is 400 pounds. The standard deviation is 10 pounds.
    a. What is the area between 415 pounds and the mean of 400 pounds?
    b. What is the area between the mean and 395 pounds?
    c. What is the probability of selecting a value at random and discovering that it has a value of less than 395 pounds?

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