Keno odds are very straightforward. The odds are based on the amount of numbers selected by the player and how many of these are matched. The more numbers you select, the better your odds are of catching them. These odds will also determine the prizes. Most keno games use 80 numbered balls to determine results, and every "spot" you choose on your card that gets matched is a "catch." In a typical round, only 20 balls get drawn. Therefore, each spot has 1 in 4 odds, or a 25% chance, of showing up in a drawing.
Here is a keno odds example:
Player A chooses nine numbers – the odds of matching 5 numbers are 1 in 31.
Player B chooses seven numbers – the odds of matching 5 numbers are 1 in 116.
Player C chooses five numbers – the odds of matching 5 numbers are 1 in 1,551.