# Joint Random Variables

1. Dec 4, 2012

### MATHTAM

X and Y are independent, exponentially distributed random variables - with possibly different parameters

Determine the density func. of Z = X / Y

How to attack ?

2. Dec 4, 2012

### haruspex

What eqn can you write for the pdf of Z at z given Y=y?
How can you then average that out over all possible y?