If M is the mean of n observations x_1-k, x_2-k, x_3-k, , x_n-k, where k is any real number, then what is the mean of x_1, x_2, x_3, , x_n?

NDA 2021 Mathematics question

If is the mean of observations , where is any real number, then what is the mean of ?

Answer: (B)

. Therefore .

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Question ID VK-033597