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Traditional BINGO is played in person in a large hall. Players meet at the hall, pay a fee to get in, then the games begin. A night of BINGO consists of many BINGO games played continuously, one after another.A single BINGO game proceeds like this: Each player has a number of BINGO cards (players can usually play any number of cards). Each BINGO card has 5 rows and 5 columns thus providing 25 spaces.

The columns are labeled from left to right with the letters: 'B', 'I', 'N', 'G', 'O'. With one exception (the center space is "free") the spaces in the card are assigned values as follows:

Furthermore, a number can appear only once on a single card.

- Each space in the 'B' column contains a number from 1 - 15.
- Each space in the 'I' column contains a number from 16 - 30.
- Each space in the 'N' column contains a number from 31 - 45.
- Each space in the 'G' column contains a number from 46 - 60.
- Each space in the 'O' column contains a number from 61 - 75.
Here's a sample BINGO card:

B I N G O 10 17 39 49 64 12 21 36 55 62 14 25 FREE

SPACE52 70 7 19 32 56 68 5 24 34 54 71 The number of unique BINGO cards is very large and can be calculated with this equation:

While perhaps interesting to a statistician, the number of possible BINGO cards has nothing to do with player's chances of winning.// the B, I, G, and O columns * the N column (15 * 14 * 13 * 12 * 11) ^ 4 * (15 * 14 * 13 * 12)You will note that there are 75 possible BINGO numbers:

Each of these numbers is represented by a ball in a large rotating bin. Each ball is painted with its unique BINGO number. An announcer spins the bin, reaches in a selects a ball, and a announces it to the room. The players check all of their cards to see if that number appears on their card. If it is, they mark it.B1, B2, B3, ... B15, I16, I17, I18, ... I30, N31, N32, ... O74, O75.When a player has a BINGO (5 in a row, column, or diagonal), he or she calls out BINGO. The game pauses while the card is verified. If indeed a winner, the game stops and a new game begins. If the card wasn't a winner, the game proceeds where it left off. Each BINGO game proceeds until someone wins (there's always a winner).

Every BINGO game has a winning card, so a player's chances of winning depend on the number of cards in the game and how many cards s/he is playing. For example, if a player has 12 cards in a game with 1200 cards, the chances of winning for that player is 1 in 100.

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