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QID: #1976
Solution for QID #1976: The mark of a student in the final exam is a random variable | StudyHelpMe
The mark of a student in the final exam is a random variable with expectation 75 and
variance 9 Determine the following probabilities:
(a) A randomly chosen student scores 90 or more
(b) The average mark of a class of 100 students is over 80
(c) A randomly chosen student in a class of 100 students gets a mark above the average mark of the 100 students
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