Wow, I am completely clueless sometimes. Sorry about the function notation, typically I use subscripts, but apparently I wasn't paying attention. Thanks for your help and quick response.
Homework Statement
Let X and Y have the joint probability density function f(x,y)=k(1-y), if 0<x<y<1 and 0 elsewhere.
a)Find the value of k that makes this pdf valid.
b) Find P(X<3/4,Y>1/2)
c) Find the marginal density function of X and Y
d) Find the expected value and variance of X and...