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Mathematics, 25.05.2017 19:13

1. two students in different classes took the same math test. both students received a score of 87. in student a's class the mean was 78 and the standard deviation of 5. in student b's class the mean was 76 with a standard deviation of 4. which student scored in the top 10% of their class?
2. the scores on a final exam were approximately normally with a mean of 82 and standard deviation of 11. if 85 students took the exam, and above a 60 is a passing grade, how many students failed the exam?

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