There is something, and there is nothing, but they are in two different places. We are in the something.
There is no one in the nothing, because they would be something. No one can be in the nothing.
Man, I hated reading Sarte.
If the composition of the universe is random, then it is much more likely that there be something than nothing (there is only one way to have nothing, but lots of ways to have something).
If you have not yet read it, I am a huge fan of Bill Bryson’s “A Short History of Nearly Everything”. Wonderful stuff on this very subject among others from a scientific standpoint.