- Basic Slots Guide
- Slots Payouts
- Slots Types
- Slot Machines Strategies
- Slots Money Management
- Spin to Win with Online Slots
- Read Books on Slots
To get familiar with the slot machines odds and probabilities it is important to define the difference between the winning odds for classical mechanical reel slots and advanced video slots using Random Number Generator.
Slot machines odds for classic reel slot machines are basically defined by certain mechanical devices that control the work of reel-type slots. Each reel of the slot machine has a set of symbols imprinted on it. The chances of hitting a particular symbol are calculated through dividing it by the total number of symbols on each reel.
For example: slot machine odds for hitting one symbol on a standard three-reel machine with ten symbols on each reel are 1 divided by 10, which is actually 9 to 1. The odds of hitting two identical symbols on two reels are 1/10 multiplied by 1/10, which is 1/100, or 99 to 1. The odds of hitting three identical symbols on three reels are respectively 1/1,000, or 999 to 1.
To calculate the payout percentages for reel slots we add the payout percentage for each bet, actual payout for each bet and the probability for winning the bet.
Modern video slot machines that have almost completely replaced the classic mechanical models offer totally different slot machines odds of winning:
This means that by use of the Random Number Generator slot machines can be programmed to hit less likely symbols combinations. The less likely the combination is, the more it actually pays out. For example, the slot machines odds to win progressive jackpot with a combination of seven symbols could have been improbable without the RNG that can be programmed to make this combination likely.