NDA 2018 Mathematics question

Consider the following statements : 1. Mean is independent of change in scale and change in origin. 2. Variance is independent of change in scale but not in origin. Which of the above statements is/are correct?

(A)1 only
(B)2 only
(C)Both 1 and 2
(D)Neither 1 nor 2Correct

Answer: (D)

Solution

If , then : the mean changes with both origin and scale, so statement 1 is incorrect. $Var(u)

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Question ID VK-028919