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Keno OddsCasino selects 20 out of 80 numbers.
E.g. $2 - 8 spot at Harrahs
odds on 10 out of 10 are 9 Million to 1.
odds on 12 out of 12 are 478 Million to 1.
The overall general formula for the probability of x matches and y marks is:
Where combin(y,x)= y!/(x!*(y-x)!)
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