I have done a lot of research into random number generators for slot machines, reel stop calculations and how to physically give the user a good chance on winning.

What I can't figure out is how to properly insure that the machine is going to have a payout rating of (lets say) 95%.

So, I have a reel set up wit 22 spaces on it. Filled with 16 different symbols.

When I get my random number, mod divide it by 64 and get the remainder, I hop over to a loop up table to see how the virtual stop relates to the reel position.

Now that I have how the reels are going to stop, do I make sure the payout ratio is correct? For every dollar they put in, how to I make sure the machine will pay out .95 cents?

Thanks for the ideas.

I am working in actionscript, if that helps with the language issues, but in general I am just looking for theory.