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Electronics and Communication Engineering - Exam Questions Papers - Discussion

Discussion Forum : Exam Questions Papers - Exam Paper 7 (Q.No. 37)
Exam Questions Papers
37.
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?
Both the student and the teacher are right
Both the student and the teacher are wrong
Both the student is wrong but the teacher is right
The student is right but the teacher is wrong
Answer: Option
Explanation:

The mean is 3.

Discussion:
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