A discrete random variable X takes values from 1 to 5 with probabilities as shown in thetable.
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
 

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