Why Does Reshuffling a Deck Reset Card Counting Probabilities?

In summary, the conversation is discussing the concept of counting cards in blackjack and how the probability of the next card being a 10 or higher can change if the dealer reshuffles the deck. The probability of 2/1 is based on the known cards that have been dealt, so when the deck is reshuffled, it alters the odds. This has nothing to do with quantum mechanics or wave functions. The analogy used in the conversation is flawed, but it highlights the importance of considering all known factors when calculating probabilities in card games.
  • #1
billy_boy_999
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if I'm counting cards in blackjack and at some point work out that the probability of the next card being dealt being a 10 or higher is 2/1, and the dealer suddenly reshuffles the deck, that probability evaporates (ask any card counter)...but why? what is going on here? reshuffling the deck doesn't alter which cards have been dealt so it doesn't alter the count that led to my 2/1 probability, so what then does it alter? is there some explanation that comes from quantum mechanics? does it have to do with wave functions?
 
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  • #2
Nothing to do with quantum mechanics. If 2 cards out of three are higher than ten, no matter reshuffling.
 
  • #3
When the dealer reshuffles, does he include all the known cards previously dealt and no longer in play? If so, the odds do change.
 
  • #4
ohohohoho! you're right! this is a corrupt analogy, thank you for the replies anyway...i'll have to try and think of another way to address this topic...
 

FAQ: Why Does Reshuffling a Deck Reset Card Counting Probabilities?

What is probability?

Probability is a measure of the likelihood that an event will occur. It is represented as a number between 0 and 1, where 0 indicates impossibility and 1 indicates certainty.

How is probability calculated?

Probability is calculated by dividing the number of favorable outcomes by the total number of possible outcomes. This can be expressed as a fraction, decimal, or percentage.

What is the difference between theoretical and experimental probability?

Theoretical probability is based on mathematical calculations and assumes an equal likelihood of all possible outcomes. Experimental probability is based on actual observations and can vary from the theoretical probability.

What is the law of large numbers in probability?

The law of large numbers states that as the number of trials or experiments increases, the experimental probability will approach the theoretical probability. In other words, the more times an event is repeated, the closer the results will be to the expected probability.

How is probability used in real life?

Probability is used in many aspects of daily life, such as weather forecasting, risk assessment in finance and insurance, and predicting the outcomes of games and sports. It is also used in scientific experiments to determine the likelihood of certain outcomes.

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