Remember the movie National Lampoon’s Vegas Vacation, when gambling fever consumes Chevy Chase’s character, Clark W. Griswold? He goes on a losing streak to beat all losing streaks while his son, Rusty, wins four cars by playing the slot machines. Maybe Clark would have done better if he had read Probability For Dummies! In this article, you discover the basic ideas behind slot machines and how they work, so that you can get past the myths and develop a strategy based on sound probability.

Understanding average payout

Do Slot Machines Have Random Odds Against

When casinos advertise that their slot machines pay out an average of 90 percent, the fine print they don’t want you to read says that you lose 10 cents from each dollar you put into the machines in the long term. (In probability terms, this advertisement means that your expected winnings are minus 10 cents on every dollar you spend every time the money goes through the machines.)

Suppose you start with $100 and bet a dollar at a time, for example. After inserting all $100 into the slot, 100 pulls later you’ll end up on average with $90, because you lose 10 percent of your money. If you run the $90 back through the machine, you’ll end up with 90 percent of it back, which is 0.90 x 90 = $81. If you run that amount through in 81 pulls, you’ll have $72.90 afterward (0.90 x 81 = 72.90). If you keep going for 44 rounds, on average, the money will be gone, unless you have the luck of Rusty Griswold!

How many pulls on the machine does your $100 give you at this rate? Each time you have less money to run through the machine, so you have fewer pulls left. If you insert $1 at a time, you can expect 972 total pulls in the long term with these average payouts (that’s the total pulls in 44 rounds). But keep in mind that casinos are designing slot machines to go faster and faster between spins. Some are even doing away with the handles and tokens by using digital readouts on gaming cards that you put into the machines. The faster machines can play up to 25 spins per hour, and 972 spins divided by 25 spins per minute is 38.88 minutes. You don’t have a very long time to enjoy your $100 before it’s gone!

Slot machines have targeted payback percentages built into their programming, but results are random. Programmed percentages on the slots work in the same way as percentages on the tables – the odds of the game lead to expected returns. Random results are not the same as equal results.

• Even though winning symbols are selected at random, some are programmed to appear more often than others. If this wasn’t the case, wild and bonus symbols would turn up at a much higher frequency and result in a major loss for the house. This does not have an impact on slot machine odds (more on that later).
• No one can predict when a slot is about to pay. By 'winning slot machine' I mean a game that offers a return to player of 96% or more. These are the games that, theoretically, pay more often. Slots are gambling games where the house has an advantage over the players.

The worst part? Casinos often advertise that their “average payouts” are even as high as 95 percent. But beware: That number applies only to certain machines, and the casinos don’t rush to tell you which ones. You really need to read or ask about the fine print before playing. You can also try to check the information on the machine to see if it lists its payouts. (Don’t expect this information to be front and center.)

Implementing a simple strategy for slots

Advice varies regarding whether you should play nickel, quarter, or dollar slot machines and whether you should max out the number of coins you bet or not (you usually get to choose between one and five coins to bet on a standard slot machine). In this section, you’ll find a few tips for getting the most bang for your buck (or nickel) when playing slot machines.

Basically, when it comes to slot machines, strategy boils down to this: Know the rules, your probability of winning, and the expected payouts; dispel any myths; and quit while you’re ahead. If you win $100, cash out $50 and play with the rest, for example. After you lose a certain amount (determined by you in advance), don’t hesitate to quit. Go to the all-you-can-eat buffet and try your luck with the casino food; odds are it’s pretty good!

Choosing among nickel, quarter, and dollar machines

The machines that have the higher denominations usually give the best payouts. So, between the nickel and quarter slots, for example, the quarter slots generally give better payouts. However, you run the risk of getting in way over your head in a hurry, so don’t bet more than you can afford to lose. The bottom line: Always choose a level that you have fun playing at and that allows you to play for your full set time limit.

Average Slot Machine Odds

Deciding how many coins to play at a time

When deciding on the number of coins you should play per spin, keep in mind that more is sometimes better. If the slot machine gives you more than two times the payout when you put in two times the number of coins, for example, you should max it out instead of playing single coins because you increase your chances of winning a bigger pot, and the expected value is higher. If the machine just gives you k times the payout for k coins, it doesn’t matter if you use the maximum number of coins. You may as well play one at a time until you can make some money and leave so your money lasts a little longer.

For example, say a quarter machine pays 10 credits for the outcome 777 when you play only a single quarter, but if you play two quarters, it gives you 25 credits for the same outcome. And if you play the maximum number of quarters (say, four), a 777 results in 1,000 credits. You can see that playing four quarters at a time gives you a better chance of winning a bigger pot in the long run (if you win, that is) compared to playing a single quarter at a time for four consecutive tries.

The latest slot machine sweeping the nation is the so-called “penny slot machine.” Although it professes to require only a penny for a spin, you get this rate only if you want to bet one penny at a time. The machines entice you to bet way more than one penny at a time; in fact, on some machines, you can bet more than 1,000 coins (called lines) on each spin — $10 a shot here, folks. Because these machines take any denomination of paper bill, as well as credit cards, your money can go faster on penny machines than on dollar machines because you can quickly lose track of your spendings. Pinching pennies may not be worth it after all!

Casinos are not able to change slot payouts, slot machines come with an already set payout percentage, when a casino places an order for a slot it specifies the long-term payout percentage it wants. Although, depending on the jurisdiction the casino may or may not be able to change the payback percentages at a later stage.

Do Slot Machines Have Random Odds This Week

For example, in Nevada, casinos are able to change the slot payout percentages by ordering a new chip from the manufacturer, the chips in the slot machines are then swapped and it is only allowed when all the appropriate paperwork is filled with the state to inform them of the change. Some of the later model slot machines support downloadable software, should a casino request a change in payout percentages the software can be sent via a central server and the slot machine can be updated without physically being opened. Yet there are strict rules in place regarding software changes and the casino is unable to make these changes on any slot while anyone is playing on it.

Slot Machine Odds By State

Best Casino Slot Machine Odds

The typical payout percentages on slots are easier understood when you first look at casino games in general, in blackjack, it is quite possible for card counters to gain a mathematical advantage over the game while strategy player can somewhat lower the house edge. Roulette players who prefer games featuring the double-zero wheel are faced with a 5.26% house edge, while a single zero wheel is 2.7%.

When it comes to slots the house edge or advantage is replaced by the payback percentage, these vary from one software supplier to the next and from one slot to the other. Some of the most popular online slots offer a payback percentage of 99%, which is much higher than that offered by land-based slot machines, which offer around 79% to 85% on average. It is most important to remember the theoretical payout percentage are calculated over an extended time-period.