[bigtunacan]

No, that's an oversimplification.

The takeout is configurable. With older machines they have to be manually set at the machines, but with more modern machines it is controlled by a server. The period of time while the takeout remains unchanged is referred to as a cycle. Casinos are generally free to change the takeout so long as it is a minimum of the regulated amount. Then there are the regulations requiring idle time at the machines like I mentioned in my previous comment. Additionally, the casino may need to notify the gaming commission prior to making a takeout change depending on local regulations.

[guelo]

Right, it's more complicated because there are different payouts with different odds. But when you add up all the payouts with all the odds it has to add up to >.75.

What I'm objecting to is your idea that machines are more likely to payout after they've lost for a while. Each spin is independent of previous spins. The 75% is just a statistical average over the long run.