Misc
Gambling
Keno Odds
Keno Odds
Casino selects 20 out of 80 numbers.E.g. $2 - 8 spot at Harrahs
| Catches | Odds | Pays | Return |
|---|---|---|---|
| 5 | 0.0183025 | $6 | $0.22 |
| 6 | 0.0023667 | 200 | 0.47 |
| 7 | 0.0001604 | 3,000 | 0.48 |
| 8 | 0.0000043 | 52,000 | 0.23 |
| Total | $1.40 | ||
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:
combin(y,x)*combin(80-y,20-x)/combin(80,20)
Where combin(y,x)= y!/(x!*(y-x)!)
See: Payback at the Keno page at the Wizard of Odds.
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