Betting pool

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A betting pool, syndicate, sports lottery, sweep, or office pool if done at work, is a form of gambling, specifically a variant of parimutuel betting influenced by lotteries, where gamblers pay a fixed price into a pool (from which taxes and a house "take" or "vig" are removed), and then make a selection on an outcome, usually related to sport. In an informal game, the vig is usually quite small or non-existent. The pool is evenly divided between those that have made the correct selection. There are no odds involved; each winner's payoff depends simply on the number of gamblers and the number of winners. (True parimutuel betting, which was historically referred to as pool betting, involves both odds calculations and variable wager amounts.)

Betting pools are not connected only to sports, as there are topics such as deaths and births which people can bet on. Death pools usually involve well-known individuals, such as celebrities and sports figures, which the participants predict will die within a certain period of time. On the other hand, birth pools involve individuals picking specific dates in which someone, who can be either a celebrity or friend, gives birth.