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Winning Odds of Slot Machines

When it comes to the winning odds of slot machines, you need to look at the issue from 2 separate perspectives. You must consider the following:

  • The odds that you will win or lose a slot game
  • The odds that your chosen bet pays out

You will have to take into account the house or player advantage to understand the difference between the two.

Let us consider the odds in a dice roll to illustrate the odds of slot machines. For a 6-sided dice, the odds of getting a particular number from the dice roll are 1 out of 6 possible numbers. Each of the six possible outcomes in the roll of the 6-sided dice has the same probability of coming up. Of the six possible outcomes in a dice roll, only one is the winning outcome. The odds for the dice roll would be 5 to 1. This means that you have 5 ways to lose in the dice roll and only 1 way to come out a winner from the same dice roll. Again, the 5 losing outcomes and 1 winning outcome have equal chances of coming up.

The odds of the dice roll is also another way of expressing a ratio, which can take the form of a fraction – 1/6 – or a percentage – 16.67%.

If a casino offers players a payout of 6 to 1 on any number that comes out on a roll of a single dice, then the casino will be on the losing end in the long run. Over time, the casino will be paying more than what it would be raking in from the series of dice rolls, assuming that the 6 numbers have the same probability of coming up. For instance, a player who bets $1 per dice roll is expected in the long run to lose $5 and walk away with $6 for every 6 rolls. This means that as the player makes more dice rolls, the results will gradually reflect the statistical probability.

On the other hand, if the casino conducts the same game and offers a payout of 5 to 1 on every bet that is made, then it would be a more profitable proposition for the casino than the first payout option. Under this kind of payout, a player loses $5 and walks away with $4 for every 6 dice rolls. This translates to $1 average profit for every 6 dice rolls.

Odds and Probability of Slots Machines

The odds of slot machines were determined in the past using several devices. Each reel of the slot machine are assigned a specific set of symbols, and the odds of hitting a particular symbol is equivalent to one divided by the total number of  the symbols for a particular reel. A typical slot machine will have 3 reels with each reel having 10 different symbols. Thus, the odds of a player hitting a particular symbol on a reel are equivalent to 9 to 1. Thus, the odds of a player hitting 3 identical symbols on a spin would be equivalent to 999 to 1, while the odds of a player hitting 2 identical symbols would be equivalent to 99 to 1.

The payout for the bets on a slot machine will always be pegged below the odds of winning such a bet. When the probability is multiplied by the payout for a particular bet on a slot machine, you will be able to get the payback percentage for a particular bet made on the slot machine. The sum of all the bets will be the payback percentage for the slot machine.

Odds of Video Slot Machines


Modern slot machines don’t operate in the same manner as the old mechanical slot machines. The mechanical reels have given way to modern video screens. On the other hand, the mechanical stops that control the spinning of the reels have been replaced by modern random number generators. The use of random number generators has significantly changed how payouts and odds of slot machines are derived.

The physical reel of a mechanical slot machine can have around 20 symbols and it may not efficiently handle more than 3 reels. On the other hand, a video slot machine generally has no limitation in the number of symbols in each reel and it is now normal to see video slot machines with more than 5 reels.

 
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