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| rev | Admin | (Created page with "'''Answer: A''' <math display="block"> \begin{aligned} & \operatorname{Var}\left(Z_{2}\right)=(1000)^{2}\left[{ }^{2} A_{x: n}-\left(A_{x: n}\right)^{2}\right]=15,000 \\ & =(1000)^{2}\left({ }^{2} A_{x: n}^{1}+{ }^{2} A_{x: n}^{1}\right)-(1000)^{2}\left[A_{x: n}^{1}+A_{x n \bar{n}}^{1}\right]^{2} \\ & =(1000)^{2}{ }^{2} A_{x: n}^{1}+(1000)^{2}{ }^{2} A_{x: n}^{1}-(1000)^{2}\left(A_{x: n}^{1}\right)^{2}-(1000)^{2}\left(A_{x n \eta}^{1}\right)^{2} \\ & -2(1000)^{2}\left(...") | Jan 18'24 at 12:09 | +1,157 |