[dogscoff]

1: The universe is infinite.
2: Therefore, no matter the ratio of races/stars, as long as the second is not infinite, their are an infinite number of races.

And don't forget what the hitchhiker's guide has to say on the subject:
"THE UNIVERSE: Some Information to help you live in it.

POPULATION: NONE

It is known that there is an infinite number of worlds, but not every one is inhabited. Therefore there must be a finite number of inhabited worlds. Any finite number divided by infinity is as near to nothing as makes no odds, so if every planet in the Universe has a population of zero then the entire population of the Universe must be zero, and any people you may actually meet from time to time are merely products of a deranged imagination."

Douglas Adams rocks, and the HHG will live forever.