Before worrying about the suits and different cards with value 10 lets figure out how many different value combinations resulting to 21 there are. For example 5, 5.

Enjoy!

Software - MORE

I generated blackjack hands as both combinations and arrangements. Then, I opened the output files (text format) and checked as many hands as possible. Yes.

Enjoy!

The Wizard of Odds answers readers' questions about Blackjack. The probability is the number of winning combinations divided by total You are forgetting that there are two possible orders, either the ace or the ten can be first. Multiply by.

Enjoy!

Software - MORE

The Wizard of Odds answers readers' questions about Blackjack. The probability is the number of winning combinations divided by total You are forgetting that there are two possible orders, either the ace or the ten can be first. Multiply by.

Enjoy!

Blackjack, formerly also Black Jack and Vingt-Un, is the American member of a global family of was unable to find any historical evidence for a special bonus for having the combination of an Ace with a black Jack. Card counting is most rewarding near the end of a complete shoe when as few as possible cards remain.

Enjoy!

Before worrying about the suits and different cards with value 10 lets figure out how many different value combinations resulting to 21 there are. For example 5, 5.

Enjoy!

Use these Blackjack Strategy Charts to learn the correct decision for every hand. given every possible combination of starting player hands and dealer up card.

Enjoy!

I generated blackjack hands as both combinations and arrangements. Then, I opened the output files (text format) and checked as many hands as possible. Yes.

Enjoy!

With the exception of Poker, Blackjack is the most popular gambling card game. the dealer by getting a count as close to 21 as possible, without going over The combination of an ace with a card other than a ten-card is known as a "softโ.

Enjoy!

Blackjack, formerly also Black Jack and Vingt-Un, is the American member of a global family of was unable to find any historical evidence for a special bonus for having the combination of an Ace with a black Jack. Card counting is most rewarding near the end of a complete shoe when as few as possible cards remain.

Enjoy!

All of this assumes flat betting, otherwise the math really gets messy. Besides every once in awhile throwing down a bigger bet just adds to the excitement and for some reason it seems logical that if you have lost a string of hands you are "due" for a win. It took me years to get the splitting pairs correct myself. Multiply dot product from step 11 by probability in step 9. I recently replaced my blackjack appendix 4 with some information about the standard deviation which may help. To test the most likely case to favor hitting, 8 decks and only 3 cards, I ran every possible situation through my combinatorial program. Here is how I did it. However if you were going to cheat it would be much better to remove an ace, which increases the house edge by 0. Putting aside some minor effects of deck composition, the dealer who pulled a 5 to a 16 the last five times in a row would be just as likely to do it the next time as the dealer who had been busting on 16 for several hours. Since this question was submitted, a player held the dice for rolls on May 23, in Atlantic City. You ask a good question for which there is no firm answer. According to my blackjack appendix 4 , the probability of an overall win in blackjack is I'm going to assume you wish to ignore ties for purposes of the streak. There is no sound bite answer to explain why you should hit. Your question however could be rephrased as, "what is the value of the ace, given that the other card is not a ten. When the dealer stands on a soft 17, the dealer will bust about When the dealer hits on a soft 17, the dealer will bust about According to my blackjack appendix 4 , the probability of a net win is However, if we skip ties, the probability is So, the probability of a four wins in a row is 0. In general the variation in the mean is inversely proportional to the square root of the number of hands you play. For how to solve the problem yourself, see my MathProblems. These expected values consider all the numerous ways the hand can play out. Thanks for the kind words. So, the best card for the player is the ace and the best for the dealer is the 5. That column seemed to put the mathematics to that "feeling" a player can get. For the non-card counter it may be assumed that the odds are the same in each new round. From my section on the house edge we find the standard deviation in blackjack to be 1. Expected Values for 3-card 16 Vs. When I said the probability of losing 8 hands in a row is 1 in I meant that starting with the next hand the probability of losing 8 in a row is 1 in The chances of 8 losses in a row over a session are greater the longer the session. Repeat step 3 but multiply by 4 instead of 2, and this time consider getting an 8 as a third card, corresponding to the situation where the player is forced to stop resplitting. Cindy of Gambling Tools was very helpful. So the probability of winning six in a row is 0. For each rank determine the probability of that rank, given that the probability of another 8 is zero. It depends on the number of decks. It would take about 5 years playing blackjack 40 hours a week before this piece of advice saved the player one unit. In that case, the probability of a win, given a resolved bet, is The probability of winning n hands is a row is 0. Repeat step 3 but multiply by 3 instead of 2. Go through all ranks, except 8, subtract that card from the deck, play out a hand with that card and an 8, determine the expected value, and multiply by 2. Blackjack is not entirely a game of independent trials like roulette, but the deck is not predisposed to run in streaks. Following this rule will result in an extra unit once every hands. Thanks for your kind words. It depends whether there is a shuffle between the blackjacks. The standard deviation of one hand is 1. It may also be the result of progressive betting or mistakes in strategy. So standing is the marginally better play. It is more a matter of degree, the more you play the more your results will approach the house edge. However there are other ways you get four aces in the same hand, for example the last card might be an 8 or 9. My question though is what does that really mean? There are cards remaining in the two decks and 32 are tens. What you have experienced is likely the result of some very bad losing streaks. Here is the exact answer for various numbers of decks. The following table displays the results. If the probability of a blackjack is p then the probability of not getting any blackjacks in 10 hands is 1- 1-p For example in a six deck game the answer would be 1- 0. Let n be the number of decks. Multiply this dot product by the probability from step 2. Any basic statistics book should have a standard normal table which will give the Z statistic of 0. The fewer the decks and the greater the number of cards the more this is true. If there were a shuffle between hands the probability would increase substantially. Add values from steps 4, 8, and The hardest part of all this is step 3. Is it that when I sit down at the table, 1 out of my next playing sessions I can expect to have an 8 hand losing streak? Steve from Phoenix, AZ. Unless you are counting cards you have the free will to bet as much as you want. This is not even a marginal play. Or does it mean that on any given loss it is a 1 in chance that it was the first of 8 losses coming my way? As I always say all betting systems are equally worthless so flying by the seat of your pants is just as good as flat betting over the long term. According to my blackjack appendix 9H the expected return of standing is So my hitting you will save 6. I know, I know, its some sort of divine intervention betting system I am talking about and no betting system affects the house edge. Resplitting up to four hands is allowed. Multiply dot product from step 7 by probability in step 5. Determine the probability that the player will not get a third eight on either hand. Take another 8 out of the deck. You are forgetting that there are two possible orders, either the ace or the ten can be first. Take the dot product of the probability and expected value over each rank. The probability of this is 1 in 5,,, For the probability for any number of throws from 1 to , please see my craps survival tables. What is important is that you play your cards right. If you want to deviate from the basic strategy here are some borderline plays: 12 against 3, 12 against 4, 13 against 2, 16 against Deviating on these hands will cost you much less. I have no problem with increasing your bet when you get a lucky feeling. The best play for a billion hands is the best play for one hand. Probability of Blackjack Decks Probability 1 4. I have a very ugly subroutine full of long formulas I determine using probability trees.{/INSERTKEYS}{/PARAGRAPH} From my blackjack appendix 7 we see that each 9 removed from a single deck game increases the house edge by 0. There are 24 sevens in the shoe. Determine the probability that the player will resplit to 4 hands. If I'm playing for fun then I leave the table when I'm not having fun any longer. Determine the probability that the player will resplit to 3 hands. I hope this answers your question. Streaks, such as the dealer drawing a 5 to a 16, are inevitable but not predictable. {PARAGRAPH}{INSERTKEYS}This is a typical question one might encounter in an introductory statistics class. If you were to add a card as the dealer you should add a 5, which increases the house edge by 0. I would have to do a computer simulation to consider all the other combinations. Because the sum of a large number of random variables always will approach a bell curve we can use the central limit theorem to get at the answer.