Key Takeaways. Gambling is not a good alternative for earning extra cash. Each game you play at a casino has a statistical probability against you winning. Slot machine odds are some of the worst, ranging from a one-in-5,000 to one-in-about-34-million chance of winning the top prize when using the maximum coin play.

In most slots, the rate is somewhere between 80% and 95%, but some games can exceed 95%. The basics of the return to player percentage indicate that if you betR$100 on a game with an RTP of 94%, you'll win backR$94. But again, this is for long-term results since the rate was determined over millions of spins.