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Keno is a lottery-like gambling game often played at modern casinos, and also offered as a game in some lotteries. Players wager by choosing numbers ranging from 1 through 80. After all players make their wagers, 20 numbers are drawn at random, either with a ball machine similar to ones used for lotteries and bingo, or with a random number generator. Each casino sets its own series of pay scale choices called "paytables". The player is paid based on how many numbers selected on the ticket match the numbers numbers drawn and the wager amount. There are a wide variety of keno paytables from casino to casino and a large deviation in the house edge set for each of those paytables. The house edge ranges from less than 4%〔(Online Keno odds )〕 to well over 35%. The typical house edge for non-slot casino games is between 0% and 5%.〔(Casino advantages for various games )〕 ==History== The word "keno" has French or Latin roots (Fr. ''quine'' "five winning numbers", L. ''quini'' "five each"), but by all accounts the game originated in China. Legend has it that the invention of the game saved an ancient city in time of war, and its widespread popularity helped raise funds to build the Great Wall of China. In modern China, the idea of using lotteries to fund a public institution was not accepted before the late 19th century. Chinese lottery is not documented before 1847 when the Portuguese Government of Macao decided to grant a licence to lottery operators. According to some, results of keno games in great cities were sent to outlying villages and hamlets by carrier pigeons, resulting in its Chinese name 白鸽票 ''báigē piào'', literally "white dove ticket", pronounced ''baak-gap-piu'' in Cantonese (which the Western spelling 'pak-ah-pu' / 'pakapoo' was based on). The Chinese played the game using sheets printed with Chinese characters, often the first 80 characters of the ''Thousand Character Classic'', from which the winning characters were selected.〔Melanie Yap, Dianne Leong Man. ''Colour, confusion and concessions'', pp.240-241.〕 Eventually, Chinese immigrants introduced keno to the West when they sailed across the Pacific Ocean to help build the First Transcontinental Railroad in the 19th century,〔(Keno History )〕 where the name was Westernized into boc hop bu〔 and puck-apu.〔 By 1866 it had already become a widely popular gambling game in Houston, Texas, under the name 'Keno'. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「keno」の詳細全文を読む スポンサード リンク
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