Blackjack experts? or math experts?

[rick07]

Will today has been intresting, I was playing at a certain casino, and noticed this streak


What are the odds of getting 7 blackjacks for the dealer in 25 hands.
0 for the player. Not in a row, seems like every 3rd hand would be a blackjack.. for the dealer.


I know its a very small sample size, however this isnt about winning or payouts or etc, just odd wise, 7 blackjacks from unknowned deck size this casino doesnt disclose the decks, in 25 hands.


Would love to hear back with the odd's and if anybodys seen worse from a non rogued casino.


Best Regards

Rick

[aka23]

The chance of 7+ blackjacks in 25 hands is about 1 in 8000. That sounds rare, but if you think about how many sets of 25 hands you had to play to see it, it becomes more reasonable.

[GaryWatson]

aka, stuff the neg rep you gave me, lol. Lets bring it to the table. We should do this live. Lets do a Q&A online.

[rick07]

Thanks for your reply,

not sure what you ment how many sets of 25 hands comment ment,


This was the first time ive played at the casino, only 25 hands were played ever it makes any difference.

I also won 0 hands out of 25, 2 pushs 2x 21's and in total 7 blackjacks for the dealer, and 0 busts for the dealer within those 25.


if any of that information made a difference to change the odds from 1-8000 let me know please,

Thank you again for your time to answer this question.

[GaryWatson]

Thanks for your reply,

not sure what you ment how many sets of 25 hands comment ment,
.

It means nothing other than set up posts. CM, ban me for this, otherwise i will keep calling out the spammer. AKA, I have given you a challenge, but I want it in real time.

[NASHVEGAS]

Thanks for your reply,

not sure what you ment how many sets of 25 hands comment ment,


This was the first time ive played at the casino, only 25 hands were played ever it makes any difference.

I also won 0 hands out of 25, 2 pushs 2x 21's and in total 7 blackjacks for the dealer, and 0 busts for the dealer within those 25.


if any of that information made a difference to change the odds from 1-8000 let me know please,

Thank you again for your time to answer this question.

Odds are .4825. Sorry my little calculator only goes 5 decimals which are all zeros..........I am guessing I need 8 or 9 decimals and the first 7 would be goose eggs.

[aka23]

Thanks for your reply,

not sure what you ment how many sets of 25 hands comment ment,


This was the first time ive played at the casino, only 25 hands were played ever it makes any difference.

I assumed you'd played a lot more than 25 hands of blackjack. I meant if you'd played 1000 hands of BJ to complete a wagering requirement, the odds of having a run of 7+ out of 25 blackjacks within that 1000 hands is a lot higher than the quoted 1 in 8000. One could make a similar statement for the # of hands played with the software before seeing the issue.

I also won 0 hands out of 25, 2 pushs 2x 21's and in total 7 blackjacks for the dealer, and 0 busts for the dealer within those 25.


if any of that information made a difference to change the odds from 1-8000 let me know please,

Thank you again for your time to answer this question.

Winning 0 out of 25 hands has a lot lower odds than 7 out of 25 hands being BJs. The chance of winning 0 out of 25 is ~(1-0.435)^25 ~= 1 in 1.6 million (assuming optimal strategy).

With which software did this occur?

[aka23]

Odds are .4827

No, that is the odds of losing a hand. The chance of not getting a win is not the same of loss (remember that there were pushes).

[GaryWatson]

AKA, lets entertain the public with your knowledge. i challenge you live

[aka23]

AKA, lets entertain the public with your knowledge. i challenge you live

I have no idea what you are talking about. I may be open to a Q/A, as you described, but I'd need more information.