Risk Management, Finance, Economics, Science, and many other areas. This paper develops the theory on both density and …<sub>2</sub> by using copulas to capture the structures between X<sub>1</sub> and X<sub>2</sub>. We then extend the theory by … copulas. Thereafter, we develop the theory on the median for the ratios of both Y and Z on two normal random variables X<sub>1 …