Gambling, the betting or staking of something of value, with consciousness of risk and hope of gain, on the outcome of a game, a contest, or an uncertain event whose result may be determined by chance or accident or have an unexpected result by reason of the bettor's miscalculation.The outcomes of gambling games may be determined by chance alone, as in the purely random activity of a tossed pair of dice or of the ball on a roulette wheel, or by physical skill, training, or prowess in athletic contests, or by a combination of strategy and chance.

Gambling games can be complicated by the rules that govern them. These depend on skill and chance so some players may be able manipulate the game to their advantage. new online casino malaysia While knowledge of the game can be useful in playing poker, betting on horse racing, or buying lottery tickets, it is not very useful for playing slot machines or purchasing lottery tickets.

Gamblers may take part in the game while betting on its outcome (cardgames, craps), or they may be prohibited from participating in any event in which they have a stake (professional athletics and lotteries). Some games are dull or nearly meaningless without the accompanying betting activity and are rarely played unless wagering occurs (coin tossing, poker, dice games, lotteries). In other games betting is not intrinsically part of the game, and the association is merely conventional and not necessary to the performance of the game itself (horse racing, football pools).

Casinos and racetracks might organize gambling when a part of patrons' money can be easily obtained by participating as a favoured player in the game, renting space or withdrawing a portion from the betting pool. Commercial and professional organizations are often required to manage large-scale activities (e.g. horse racing, lotteries).

Prevalence of principal forms

An estimate of the global legal wagering amount is $10 trillion. Illegal gambling could exceed this number. Lotteries are the most popular form of gambling in terms of total turnover. Lotteries that are state-licensed or operated by states grew rapidly in Europe and the United States in the latter half of the 20th century. They are now widely available throughout the globe. There are organized soccer (soccer), pools in almost all European countries, many South American countries, Australia, and some African and Asian countries.

Most of these countries also offer either state-organized or state-licensed wagering on other sporting events. Betting on horse racing is a leading form of gambling in English-speaking countries and in France. It also exists in many other countries. Wherever horse racing is popular, it has usually become a major business, with its own newspapers and other periodicals, extensive statistical services, self-styled experts who sell advice on how to bet, and sophisticated communication networks that furnish information to betting centres, bookmakers and their employees, and workers involved with the care and breeding of horses.

The same is true, to a smaller extent, of dog racing. Satellite broadcasting technology has enabled the creation of off-track betting facilities. These facilities allow bettors to watch live telecasts from locations other than the racetrack. Since at least the 17th century, casinos or gambling houses have been around. In the 20th century they became commonplace and assumed almost a uniform character throughout the world. They are allowed in many of the most popular holiday resorts in Europe and South America, but not always in cities. For many years, casinos in the United States were only legal in Nevada and New Jersey, and Puerto Rico. However, most states now allow casino gambling and betting facilities are allowed to operate in secret throughout the country. This is often due to corruption of political officials.

Roulette is a popular gambling game in casinos across France and Monaco. Craps is the most popular dice game in American casinos. Slot and video poker machines are a mainstay of casinos in the United States and Europe and also are found in thousands of private clubs, restaurants, and other establishments; they are also common in Australia. Among the card games played at casinos, baccarat, in its popular form chemin de fer, has remained a principal gambling game in Great Britain and in the continental casinos most often patronized by the English at Deauville, Biarritz, and the Riviera resorts. Faro, once the most popular gambling game in America, has been largely abandoned. Blackjack is the most popular card game in American casinos. The French card game trente et quarante (or rouge et noir) is played at Monte-Carlo and a few other continental casinos.

Many other games may also be found in some casinos--for example, sic bo, fan-tan, and pai-gow poker in Asia and local games such as boule, banca francesa, and kalooki in Europe. Poker gained popularity due to the increased visibility of poker tournaments on television and the increase in online playing venues. Another growing form of Internet gambling is the so-called betting exchanges--Internet Web sites on which players make wagers with one another, with the Web site taking a small cut of each wager in exchange for organizing and handling the transaction.

Chances, probabilities, and odds

Equally probable events or outcomes have equal chances of happening in each instance. In games of pure chance, each instance is a completely independent one; that is, each play has the same probability as each of the others of producing a given outcome. Probability statements apply in practice to a long series of events but not to individual ones. The law of large number is a result of the fact that probability statements predict more events than they can predict. However, the probability of a particular type of outcome being achieved with increasing repetitions makes it less likely that it will be predicted. It is the ratios that are accurately predictable, not the individual events or precise totals.

The probability of a favorable outcome from all possible outcomes can be expressed as probability (p). This is the sum of the total number (f) of favourable outcomes divided by the total (t), or p = (f/t). This holds true only for situations that are determined by chance. In a game of tossing two dice, for example, the total number of possible outcomes is 36 (each of six sides of one die combined with each of six sides of the other), and the number of ways to make, say, a seven is six (made by throwing 1 and 6, 2 and 5, 3 and 4, 4 and 3, 5 and 2, or 6 and 1); therefore, the probability of throwing a seven is 6/36, or 1/6.

In most gambling games it is customary to express the idea of probability in terms of odds against winning. This is simply the ratio of the unfavourable possibilities to the favourable ones. Because the probability of throwing a seven is 1/6, on average one throw in six would be favourable and five would not; the odds against throwing a seven are therefore 5 to 1. The probability of getting heads in a toss of a coin is 1/2; the odds are 1 to 1, called even.

Care must be used in interpreting the phrase on average, which applies most accurately to a large number of cases and is not useful in individual instances. The doctrine of the maturity or Monte-Carlo, a common mistake made by gamblers, falsely assumes that every play in a game is dependent on the others. This implies that a series involving one type of outcome should be balanced out by the other. This fallacy has been the basis for many systems that have been created by gamblers. Casino operators love to encourage such systems and exploit any gambler's ignorance of the rules of probability and independent play. An interesting example of a game where each play is dependent on previous plays, however, is blackjack, where cards already dealt from the dealing shoe affect the composition of the remaining cards; for example, if all of the aces (worth 1 or 11 points) have been dealt, it is no longer possible to achieve a "natural" (a 21 with two cards). This fact forms the basis for some systems where it is possible to overcome the house advantage.

In some games an advantage may go to the dealer, the banker (the individual who collects and redistributes the stakes), or some other participant. Therefore, not all players have equal chances to win or equal payoffs. This inequality may be corrected by rotating the players among the positions in the game. Commercial gambling operators, however, usually make their profits by regularly occupying an advantaged position as the dealer, or they may charge money for the opportunity to play or subtract a proportion of money from the wagers on each play.

In the dice game of craps--which is among the major casino games offering the gambler the most favourable odds--the casino returns to winners from 3/5 of 1 percent to 27 percent less than the fair odds, depending on the type of bet made. The house advantage ("vigorish") in roulette in American casinos can vary depending on the bet. In European casinos, it varies between 1.35 and 2.7 percent.

The house must always win the long-term. Some casinos have rules that increase their profits, including rules that limit the amount that can be staked in certain situations. Many gambling games involve elements of strategy or physical skill as well as chance. The game of poker, like most other card games, is a mixture of chance and strategy that also involves a considerable amount of psychology. Horse racing and other athletic contests require the evaluation of a contestant's ability and other evaluative skills.

In order to ensure that chance is allowed to play a major role in determining the outcomes of such games, weights, handicaps, or other correctives may be introduced