Find lowest score on final exam that would qualify student

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In a large section of a statistics class, the points for the final exam are normally distributed with a mean of 72 and a standard deviation of 9. Grades are to be assignedd according to the following rule:

The top 10% receive As
The next 20% recive Bs
The middle 40% receive Cs
The next 20% receive Ds
The bottom 10% recieve Fs

Find the lowest score on the final exam that would qualify a student for an A, a B and a C

Reference no: EM13130699

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