Question
Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9. The teacher wants to give A's
Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students, B's to the next 20%, and C's to the next 40%. What is the cutoff for an C grade? (Round your answer to the nearest whole number).
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Precalculus Mathematics For Calculus
Authors: David M Kennedy, James Stewart, Lothar Redlin, Saleem Watson
6th Edition
1133715044, 9781133715047
