What Is the Probability of Getting Blackjack With One Deck?

In a game of blackjack, the probability of getting blackjack (an ace and a ten-value card) with one deck is 4/13, or approximately 30.77%.

This probability increases with the number of decks used; with two decks, the probability is 4/26, or approximately 15.38%.

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There are a number of factors that affect the probability of getting blackjack. The first is the number of decks being used; as mentioned above, the probability increases with the number of decks.

PRO TIP:If you are playing with one deck, the probability of getting a blackjack (21 points with Ace and 10 valued card) is 4.75%. Keep in mind that if you are playing with more than one deck, the probability of getting a blackjack increases as the number of decks increases.

The second is the composition of the deck; if there are more aces and ten-value cards, the probability will be higher. Finally, the strategy being used can affect the probability; for example, if the player always splits aces and eight-value cards, this will increase the chances of getting blackjack.

The probability of getting blackjack with one deck is 30.

This probability increases with the number of decks used and with certain playing strategies.