
O |
| Odds | |
| The mathematical probability of an outcome. Expressed as a ratio. | |
| Open | |
| Any time the counter is open for taking wagers. | |
| Original Ticket | |
| The blank filled out by the player and presented to the keno writer, which is the basis for all keno payouts. Also Master Ticket. | |
| Outside Ticket | |
| The official game ticket returned to the player in exchange for his hand marked ticket and the appropriate wager. | |
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