Grades on a final exam in economics

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Reference no: EM131098564

Grades on a final exam in Economics are normally distributed with a mean of 71 and a standard deviation of 11.

A. What is the probability that a randomly selected student will receive a score greater than 80?

B. What is the probability that a randomly selected student will score less than 60 and fail the exam?

C. If the top 10% of scores receive a grade of "A", what is the minimum score needed to get an "A"?

Reference no: EM131098564

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