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When a player bets on the numbers marked as a single wager it is a straight ticket betting. Despite this way of playing is very simple many players prefer to bet more combinations.
King ticket: A number circled by itself is the king, which is used in all combinations marked.
If a player marks several number groupings and plays combinations of them he makes a combination ticket bet.
The player is paid based on how many numbers the player choses and how many numbers are "hit", multiplied by the proportion of the player's original wager to the “base rate” of the paytable. Your payout will be greater if most of your chosen numbers hit.
The probability that al 20 numbers chosen by you will hit is 1 in 3.5 quintillion.
After all the balls are drawn, the winners get their payouts, which are often quite different in different gambling houses. If you have, for example, a four-spot ticket, you are paid 1:1 if 2 numbers hit, 1:5 if 3 numbers hit and 1:120! if all the 4 numbers hit. But in another casino, the three-number hit might pay and all four 5, and in another the payoffs might be and 0. Because of the variation, no payback percentage is common enough to be called average.
Keno is played at modern casinos, it is a lottery-like or bingo-like gambling game. There is a circular glass enclosure called a "bubble" containing 80 ping pong-like balls which determine the balldraw result in keno. Each ball is imprinted with a number 1 through 80. A blower pushes air into the bubble and mixes the balls during the balldraw. A "caller" is used to press a lever opening a tube, where the balls lift one at a time into a "V" shaped tube called the "rabbit ears". The caller and a "verifier" are used to record each of 20 balls drawn, and the computerized keno system is used to calculate all wagers based on the numbers drawn.
One can choose any numbers on a a blank keno ticket form and mark them with an "X". After that you can place your wagers and then the casino draws 20 balls (numbers) at random.
Every casino has its "paytables" - series of pay scale choices. The player is paid based on how many numbers drawn match the numbers selected on the ticket and according to the paytable selected with regard to the wager amount. Keno paytables and the house edge set for each of those paytables vary greatly from casino to casino. One can hardly find two absolutely identical keno paytables.
Usually the house edge is from less than 4% to 66%.
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