Question

Joint d.f of X and Y:
F(x,y)=(1/156) xy(x^2+y) ,0<=x<=3,0<=y<=4
determine distribution function of Y

Answer 1

F(x,y)=(1/156) xy(\[x^{2}\]+y) ;\[0\le x \le3,0\le y \le4\]

Answer 2

Have a look here
-> http://en.wikipedia.org/wiki/Cumulative_distribution_function