The mean of the series x_1,x_2,x_3,...,x_n is X^{-}.If x_2 is replaced by λ,then what is the new mean ? [NDA I 2016]

Correct Answer is : n−X−x2+λn

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The mean of the series x1,x2,x3,...,xn is

−

.If x2 is replaced by λ,then what is the new mean ?

[NDA I 2016]

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