# The Odds of a Slot Machine Explained

A slot is an authorization to either take-off or land at a particular airport on a specific day during a specified time period. This authorization is distinct from air traffic control clearance or similar authorizations.

Casinos control the odds of their slot machines by setting a probability level that corresponds to a desired payback percentage. They also use a random number generator, which determines the results of each spin before the reels stop spinning.

#### Odds on a Simple Machine

On a three-reel mechanical slot with ten symbols on each reel and a limited paytable, there are 216 possible combinations that can be made. The probability of any one combination is 1/216.

Modern video slots and electromechanical slot machines have a far greater number of reel combinations than ever before. This allows designers to program symbols that turn up much more often than others, allowing casinos to offer bigger jackpots.

#### Probability Explained

To calculate the probability of a certain outcome, you need to know the math behind it. This is called probability, and it’s the same math that you learned in middle school.

Slots are an exciting form of gambling, and they can be fun to play if you understand what they are and how they work. The key is to find the right slot for you and your budget.

A great way to learn about a slot game is to try it out for free. You can do this by spinning the reels in a 100-spin test.