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