The 12:50, because it's 10 to 1 if you catch it.
If you say ten to one something will or will not happen, you mean it is very likely that it will or will not happen.
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What sneaks through doors and windows without knocking?
What has no beginning, end, or middle?
What's the largest number of coins you can have without having even change for a dollar?
What jumps when it walks and sits when it stands?