Question: suppose that an instructor of a math class assigns grades as follows. students with z-scores of 1.28 or above will receive an A; z-scores between

suppose that an instructor of a math class assigns grades as follows. students with z-scores of 1.28 or above will receive an A; z-scores between .67 and 1.28 will receive a B; z-scores between -.25 and .67 will receive a C; z-scores between -.84 and -.25 will receive a grade of D. Students with z-scores below -.84 will receive an F. what percentage of students receive a grade of C

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