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)`
