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Keno
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 | Keno is a lottery-like or bingo-like gambling game played at modern casinos. A traditional live casino keno game uses a circular glass enclosure called a "bubble" containing 80 ping pong-like balls which determine the balldraw result. Each ball is imprinted with a number 1 through 80. During the balldraw, a blower pushes air into the bubble and mixes the balls. A "caller" presses 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" record each of 20 balls drawn, and the computerized keno system calculates all wagers based on the numbers drawn.
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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. Some casinos automatically call the balldraw at preset timed intervals regardless of whether or not players are waiting to place a wager.
Each casino sets on its own how to pay to the winner. 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. 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. Additionally, each casino typically offers many different paytables and specialty keno bets for customers to choose from, each with its own unique house edge. No two casinos' keno paytables are identical. There are several Reno and Las Vegas casinos offering as many as 20 or 30 different paytables from which the player can choose.
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Keno history
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Keno originated in China in the Han Dynasty between 205 and 187 B.C. Chinese immigrants brought the game to America in the 19th century.
The word "keno" has French or Latin roots, but by all accounts the game originated in China over 2000 years ago. Legend has it that the invention of the game saved the city in time of war, and its popularity only helped raise funds to build the Great Wall. According to one source, results of keno games in great cities were sent to outlying villages and hamlets by carrier pigeon. Eventually, Chinese immigrants introduced keno to the West when they sailed across the Pacific to help build the American trans-continental railroad in the 19th century.
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How to play keno
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Keno is a simple game to play. Each keno ticket is numbered from 1 to 80. These numbers correspond to the numbered balls in the keno bowl from which 20 numbers are randomly selected each game.
To play keno, you simply mark 1 to 20 numbers on a blank keno ticket. Then, decide the amount you wish to put in, and the number of games you wish to play with, in the space indicated on the ticket. Present this ticket with your wager to a keno writer and you will receive a computer generated ticket in return.
These are the numbers, as registered in the computer, upon which all winners are paid.
When each game begins, the selected numbers will be displayed on keno boards located in the keno lounge and restaurants. Compare the numbers on your ticket with the numbers displayed on the keno boards. If you have the same numbers then you hand over the ticket to the runner and, you get your share of the money
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