When a player bets on the numbers marked as a single wager it is a straight ticket betting. The simplest way to play is to make a straight ticket bet, but a lot of players don't like it.
A king ticket bet is made when a player chooses a number which is used in all combinations marked.
Combination ticket: The player marks several number groupings and plays combinations of them.
Keno payouts are based on how many numbers the player choses and how many numbers are "hit", multiplied by the proportion of the player's original wager to the “base rate” of the paytable. Typically, the more numbers a player chooses and the more numbers hit, the greater the payout, although some paytables pay for hitting a lesser number of spots.
Your chances to choose all 20 numbers correctly are 1 in 3.5 quintillion.
After the 20 numbers are drawn, winning tickets are paid according to a table that varies from house to house. For example, a four-spot ticket with wagered might return the if two numbers hit, bring if three numbers hit, and pay 0 if all four come in. Though in another casino the corresponding payouts will be different. Because of the variation, no payback percentage is common enough to be called average.

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