Keno - Games

Keno is a lottery-like or bingo-like gambling game played at most modern casinos, and at many bingo halls. A player chooses anywhere from 1 to 20 numbers and marks them on a keno ticket of 80 numbers (1 to 80). The casino then draws 20 numbers at random. The player is paid out against his original wager based on how many numbers match the ones he marked on his ticket.

As a casino game, it is notable because keno bets often have a house edge larger than any other game. The house edge ranges from 4% to 66%. The typical house edge for non-slot casino games is between 0% and 5%.

Keno is believed to have originated in ancient China in the Han Dynasty between 205 and 187 B.C. The game was brought to America in the 19th century by Chinese immigrants.

From Wikipedia's

Keno