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The undergraduate grade point averages​ (UGPA) of students taking an admissions test in a recent year...

The undergraduate grade point averages​ (UGPA) of students taking an admissions test in a recent year can be approximated by a normal​ distribution, as shown in the figure. Mean = 3.28 and standard deviation = 0.17

​(a) What is the minimum UGPA that would still place a student in the top 10​% of​ UGPAs? ​

(b) Between what two values does the middle 50​% of the UGPAs​ lie?

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