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Statement-1 :The weighted mean of first n natural numbers whose weights are equal is given by ((n+1)/2) . Statement-2 : If omega_1,omega_2,omega_3, … omega_n be the weights assigned to be n values x_1,x_2,… x_n respectively of a variable x, then weighted A.M. is equal to (Sigma_(i=1)^(n) omega_ix_i)/(Sigma_(i=1)^(n) omega_i)

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