Question

. Consider the following joint probability density function (pdf) of the random variables X and Y:

                f(x,y) = 

Answer 1

The joint probability density function are defined for two variables simultaneously.

There are two or more random variables.

For Example-

$f(x,y)=\dfrac{3x-y}{9},1<x<3,5<y<8$

and 0 otherwise.