let x & y be continuous random variables with joint density function f(x,y) = {(3/2)(x Solution Marginal distribution of x i.e M(X) = integral [0 to 1] f(x,y) dy => 3/2(x^2+y^2) => 3/(2x) tan^(-1) (y/x) => 3/(2x) tan^(-1)(1/x) Marginal distribution of y i.e M(y) = integral [0 to 1] f(x,y) dx => 3/2(x^2+y^2) => 3/(2y) tan^(-1) (x/y) => 3/(2y) tan^(-1)(1/y).