New Posts For Thread: how do you calculate the chances of this:https://community.betfair.com/general_betting/go/thread/view/94082/30195891/how-do-you-calculate-the-chances-of-this13 random playing cards are dealt out (our hand)A different deck is used as the master deck.Turn over a card from the master deck, look for a match in our hand and then discard the turned-over card.Repeat 30 times (so only 22 cards left in the masterI agree with Donny Osmond ~(39!22!)/(52!9!) =7.8 [-07]https://community.betfair.com/general_betting/go/thread/view/94082/30195891/how-do-you-calculate-the-chances-of-this?post_id=538235401#538235401I agree with Donny Osmond ~(39!22!)/(52!9!) =7.8 [-07]Sun, 02 Mar 2014 15:51:18 -0600its not what you said !the odds of a match at stage 2 is ( note we dont bother with stage 2 if stage 1 gives a match)39/52 x 13/51 = 0.191and we know that a match at stage one is 0.25so odds of no match after stage 2 is 1-(0.25+0.191)= 0.559our othehttps://community.betfair.com/general_betting/go/thread/view/94082/30195891/how-do-you-calculate-the-chances-of-this?post_id=537914089#537914089its not what you said !the odds of a match at stage 2 is ( note we dont bother with stage 2 if stage 1 gives a match)39/52 x 13/51 = 0.191and we know that a match at stage one is 0.25so odds of no match after stage 2 is 1-(0.25+0.191)= 0.559our otheMon, 10 Feb 2014 15:40:56 -0600What?https://community.betfair.com/general_betting/go/thread/view/94082/30195891/how-do-you-calculate-the-chances-of-this?post_id=537912225#537912225What?Mon, 10 Feb 2014 14:06:01 -0600donny thats what i said but u said i was wrong!!https://community.betfair.com/general_betting/go/thread/view/94082/30195891/how-do-you-calculate-the-chances-of-this?post_id=537911249#537911249donny thats what i said but u said i was wrong!!Mon, 10 Feb 2014 13:09:17 -0600the odds of a match at stage 1 is 3/1 or 13/52but then the odds of a match at stage 2 is 13/51, assuming you had no match at stage 1but to get to this point you have a double at 39/52 x 13/51https://community.betfair.com/general_betting/go/thread/view/94082/30195891/how-do-you-calculate-the-chances-of-this?post_id=537904833#537904833the odds of a match at stage 1 is 3/1 or 13/52but then the odds of a match at stage 2 is 13/51, assuming you had no match at stage 1but to get to this point you have a double at 39/52 x 13/51Mon, 10 Feb 2014 07:17:49 -0600thanks for the answers guys. Pretty sure it's the 30 leg acca which starts at 3/1 and odds decrease slightly as cards are removed from the master deck. I was getting the maths wrong, but I'll take the 1.2million/1 as an answer.As I said - it happenhttps://community.betfair.com/general_betting/go/thread/view/94082/30195891/how-do-you-calculate-the-chances-of-this?post_id=537904187#537904187thanks for the answers guys. Pretty sure it's the 30 leg acca which starts at 3/1 and odds decrease slightly as cards are removed from the master deck. I was getting the maths wrong, but I'll take the 1.2million/1 as an answer.As I said - it happenMon, 10 Feb 2014 06:35:54 -0600no .....your system is wronghttps://community.betfair.com/general_betting/go/thread/view/94082/30195891/how-do-you-calculate-the-chances-of-this?post_id=537895997#537895997no .....your system is wrongSun, 09 Feb 2014 14:16:08 -0600donny u stated my system doesnt work for just the aces what about the original question?https://community.betfair.com/general_betting/go/thread/view/94082/30195891/how-do-you-calculate-the-chances-of-this?post_id=537895781#537895781donny u stated my system doesnt work for just the aces what about the original question?Sun, 09 Feb 2014 14:05:29 -0600Trolling or stupid. I give up.If the OP wants a correct answer, which has been given at least four times, he'll post again.https://community.betfair.com/general_betting/go/thread/view/94082/30195891/how-do-you-calculate-the-chances-of-this?post_id=537895777#537895777Trolling or stupid. I give up.If the OP wants a correct answer, which has been given at least four times, he'll post again.Sun, 09 Feb 2014 14:05:21 -0600no your system is wrong if the maths works then it always workshttps://community.betfair.com/general_betting/go/thread/view/94082/30195891/how-do-you-calculate-the-chances-of-this?post_id=537895361#537895361no your system is wrong if the maths works then it always worksSun, 09 Feb 2014 13:43:01 -0600