If X=20 is the mean of 10 observations x_1, x_2, , x_ 10 ; then what is the value of _ i=1 ^ 10 ( 3x_i-4 5 )?

NDA 2023 Mathematics question

If is the mean of 10 observations ; then what is the value of ?

Answer: (C)

. Then

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Question ID VK-029753