A discrete random variable X takes values from 1 to 5 with probabilities as shown in the table. A student calculates the mean of X and 3.5 and her teacher calculates the variance of X as 1.5. Which of the following statements is true?-A-Both the student and the teacher are rightB-Both the student and the teacher are wrongC-Both the student is wrong but the teacher is rightD-The student is right but the teacher is wrong-B-Both the student and the teacher are wrong

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B Both the student and the teacher are wrong The mean is 3.

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A discrete random variable X takes values from 1 to 5 with probabilities as shown in the table. A student calculates the mean of X and 3.5 and her teacher calculates the variance of X as 1.5. Which of the following statements is true?

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Exam Questions Papers - Engineering

A discrete random variable X takes values from 1 to 5 with probabilities as shown in the table. A student calculates the mean of X and 3.5 and her teacher calculates the variance of X as 1.5. Which of the following statements is true?

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