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A teacher finds that the scores of a particularly difficult test were approximately normally distributed with a mean of 76 and standard deviation of 14.
A teacher finds that the scores of a particularly difficult test were approximately normally distributed with a mean of 76 and standard deviation of 14. If a score below 60 represents a grade of F (failure), approximately what percent of students failed the test? If the cutoff for a grade of A is the lowest score of the top 10%, what is that cutoff point? How many points must be added to the students' scores so that only 5% fail?
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