MAT 1272 Statistics, SP2014

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    Ezra Halleck
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    13) *The marks on a statistics exam are normally distributed with mean 70 and standard deviation of 10.

    a) Find the probability that a mark will be between 60 and 90.
    b) If less than 60 is a failing grade, what is the probability that a student fails the class.
    c) If only the best 10% of the grade in the class will receive an A, what grade must a student obtain in order to get an A?

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