1. The problem statement, all variables and given/known data Let X and Y be random variables of the continuous type having the join p.d.f.: f(x,y) = 8xy, 0<=x<=y<=1 Find the marginal pdf's of X. Write your answer in terms of x. Find the marginal pdf's of X. Write your answer in terms of x. 2. Relevant equations 3. The attempt at a solution f1(x) = integral(8xy)dy from 0 to 1 f2(y) = integral(8xy)dx from 0 to 1 f1(x) = 4x f2(x) = 4y This isn't right. what am I doing wrong?