To understand keno odds, you first need to understand how the game is played. The game of keno employs 80 balls that are numbered 1 through 80. During each draw the house draws 20 balls at random and displays their numbers on video screen or digital boards, called keno boards.

The results of the draw are also displayed on video screens that located throughout the casino and in the keno lounge pay off depending on various modes of play.The object of the keno game is to choose numbers that are direct hits. These twenty numbers are on balls which are drawn randomly from a hopper. The balls are mixed together and then read by a casino dealer.If you are playing online, then the numbers will more than likely be selected by a RNG, which is simply an acronym for a computerized program known as a random number generator. Usually players use special black markers or crayons for marking the ticket and then you take it to a teller, called a keno writer in the United Kingdom, where it is verified and replicated as a computerized ticket.

Finally, it would be interesting to discuss the odds differential that makes Keno a profitable game for casinos.  Players are generally allowed to choose from 1 to 15 numbers per drawing.  The odds, though, of hitting all 15 numbers that one has selected are almost statistically insignificant.  Even 10 numbers, as mentioned above, are extraordinarily difficult to hit.  Despite this, though, the odds given to the player are usually but a fraction of what they should be.  For instance, the odds of hitting a 7-number card for all 7 numbers is 1 in 40,978.  Therefore, the odds given to the player should be somewhere in that neighborhood, with consideration given to the fact that they have the possibility, in most games, of getting a return on their money by hitting as few as 3 numbers.  However, in many Keno games, the players are given odds like $2,000 to 1 for hitting all 7 numbers.  Obviously, this doesn't even approach the true chances of doing so, and that is precisely why Keno is such a profitable game for the casinos and is considered to be such a bad bet for gamblers that only amateurs will play. Speaking of odds brings up mathematical thoughts. There is a very interesting site at Winning with Numbers that covers bingo, lotteries and keno. It has sections discussing the odds of each as well as additional information about each game. Definitely worth the time to check it out if the mathematical side of games interests you. The Keno Odds section is an even more in depth discussion than I have here.