redsales: "pure randomness cannot guarantee a certain %age, because there are no guarantees in a purely random system."

That is soooo wrong! If it's perfectly random then an infinite series is absolutely guaranteed to have whatever percentages. It's the not-quite-random ones that are dodgy.

You'll agree that perfectly made dice are perfectly random? And that the 1/6 possibility of a 6 occuring is not a random number but is "manipulated" by the dice designer (through the choice of having 6 sides)? Are the dice "skewed" to give 1/6 of each number in the long term or is that just how it comes out in the natural course of events?

So how are the machines any different? Why would they need to be?