Let x_1, x_2,......x_ 10 be ten observations such that _ i=1 ^ 10 (x_i-2)=30, _ i=1 ^ 10 (x_i- )^2=98, 2...

Question

Let x_1, x_2,......x_ 10 be ten observations such that _ i=1 ^ 10 (x_i-2)=30, _ i=1 ^ 10 (x_i- )^2=98, > 2 and their variance is 4 5 . If and ^2 are respectively the mean and the variance of 2(x_1-1)+4 , 2(x_2-1)+4 , ....., 2(x_ 10 -1)+4 , then ^2 is equal to :

Accepted Answer

(1)

JEE Main 2025 Mathematics question

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