Quote:
Originally Posted by poker2016
thanks, how u get these number tho? I lost to quads on 999 and 555 this week on 1/2 live cash so I start to think about this...but it's so hard for people floping a quads, I think is 17,295 to 1? (search on google). so what number should we look at it? combos vs chance of flopping quads. yes, there a ton of combos of quads (48). BUT it so hard to flop a quads...should we still pay them off...let's say we have AA.
Again, you have to work with the right numbers. You are looking at it backwards. You don't look at the liklihood of flopping quads, you look at the liklihood that someone has the fourth quad card if the flop is trips.
The way I get those numbers is by finding the odds that a player does NOT have the fourth quad card, and then subtracting that from 100%.
If you know that there are 3 nines on the flop, and you know that you do not have a nine, that means there are 47 unknown cards, and only 1 nine. The liklihood of the villains first card NOT being a nine is 46/47, or 97.87%. The liklihood of him not having a nine on his second card, is 45/46 , or 97.82%. So the liklihood of him not having a nine on either card is the liklihood of both events multiplied together, or 95.7%, which means that the liklihood of him having a nine is 4.3% (some rounding errors between this and my first set of numbers). You can continue this logic to include 2,3, or more players.
You seem to be wanting to compute the liklihood of events without taking into account information that changes the possible outcomes. Yes, it is unlikely to flop quads with any two cards (I have it as 1 in 9800), but, once a flop has come up with trips, you have to look at it the other way, what are the odds that someone holds that 4th quad card.
Action influences those odds, of course. If the board is 555, and you raised from middle position and got only one or two callers, you can reduce likely combos down to A5s, 45, 56, and 57, and those might be eliminated based on the situation (for example, late in a tournament, where stacks are 20 to 30 bb, it is less likely that players will have those hands in a calling range).