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Example 5: Scores on MATH 235 have a mean of 85 and a standard deviation of 5. Let X represents students test result on the

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Example 5: Scores on MATH 235 have a mean of 85 and a standard deviation of 5. Let X represents students test result on the exam (assume X is a random normal variable). what is the probability that a randomly selected student will get a grade of: a. Lower than 90? b. Higher than 85 c. Between 90 and 95? d.Find the 90-th percentile? PI ie. find c such that P(X

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