Have you ever played blackjack? it is a complex game
Yes and no wonder it is the most widely played casino banking game in the world.
What are the odds of winning it?
Well the card game is usually between several players and a dealer, so the odds would depend on that.
Oh okay, does anyone play professionally
dealt two cards, normally one up (exposed) and one down 
(hidden). In most other countries, the dealer receives one card face up. The value of cards two through ten is their pip value (2 through 10). Face cards (Jack, Queen, and King) are all worth ten. Aces can be worth one or eleven. A hand's value is the sum of the card values. Players are allowed to draw additional cards to improve their hands. A hand with an ace
Blackjack
Blackjack is the American variant of a globally popular banking game known as Twenty-One, whose relatives include Pontoon and Vingt-et-Un. It is a comparing card game between one or more players and a dealer, where each player in turn competes against the dealer. Players do not compete against each other. It is played with one or more decks of 52 cards, and is the most widely played casino banking game in the world. The objective of the game is to beat the dealer in one