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Back to Library QID: #71928

Solution for QID #71928: The grades of a group of 1000 students in an exam are normal | StudyHelpMe

Subject: Physics

Status: Made to Order

The grades of a group of 1000 students in an exam are normally distributed with a mean of 70 and a standard deviation of 10. A student from this group is selected randomly. a) Find the probability that his/her grade is greater than 80. b) Find the probability that his/her grade is less than 50. c) Find the probability that his/her grade is between 50 and 80. d) Approximately, how many students have grades greater than 80?

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