When you play Blackjack you have some incomplete information to base you playing decisions on. You know the value of your two cards and you know the value of the dealer's up card. You don't know what the dealer's hole card is and you don't know what the next card out of the shoe will be. When you play you can make an accurate decision based on just the information that you do know.

The dealer will bust more often with certain up cards than with others. Here are the percentages that you can expect a dealer to bust when you play Blackjack based on their up card.