Joint PDF --> Marginal Pdf's 1. The problem statement, all variables and given/known data Suppose that the random vector (X, Y ) has the probability density function (pdf) fX,Y (x, y) = k(x − y), if 0 < y < x < 1 0, otherwise. 1. Find the value of k, so that fX,Y (x, y) is a genuine pdf. 2. Find the marginal density function of Y , fY (y) and of X, fX(x). 2. Relevant equations 3. The attempt at a solution 1. k = -6 (using 0<y<x, 0<x<1) 2. fY(y) ??? fX(x) = 3x^2 ...having trouble finding fY(y) that eventuates at a true pdf???