» Keno Lottery Traditional Variation

A lot of modern casinos offer an opportunity to play keno - 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 is used to push air into the bubble and mix the balls during the balldraw. A lever opening a tube is pressed by a "caller" and then the balls lift one at a time into a "V" shaped tube called the "rabbit ears". Each of 20 balls drawn are recorded by the caller and a "verifier" and all wagers based on the numbers drawn are calculated by the computerized keno system.
Players wager by marking an "X" over the "spot" choices on a blank keno ticket form with 80 numbered selection boxes (1 to 80). After all players successfully place their wagers, the casino draws 20 balls (numbers) at random.
Each casino sets its own series of pay scale choices called "paytables". Depending on how many numbers drawn match the numbers selected on the ticket the player is paid this or that sum of money. Players will find a wide variation of keno paytables from casino to casino and a large deviation in the house edge set for each of those paytables. No two casinos' keno paytables are identical.
Usually the house edge is from less than 4% to 66%.