# Sports betting

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Or are the odds stacked against you…? Give it a try! We've put together this fun little quiz to test your American odds skills. Well, it looks like you have some of the basics down but you could still do with brushing up on how odds work before you start placing any big bets. Or maybe you just got tripped up by that genius Julius American answer!

Aha, it looks like you were paying attention after all. This actually translates to 1. They also dictate how much profit a player can make when betting on an event at that particular sportsbook. They're often heavily influenced by Vegas odds, football in particular. In theory, odds can be shown in any format no matter what the game. In practice, however, the location of the target audience will have some impact on this.

For example, NFL odds will virtually always be shown initially, at least in the American format because the viewing audience is predominantly based in the USA.

You may not actually need to do this, since most sports betting sites have functions to calculate your potential winnings in real time. Plus, it will help you to avoid making silly mistakes like placing big bets on events that actually have bad odds. However, most will also have their own teams that calculate odds based on all sorts of criteria, including everything from the location of the match and weather to player absences or injury risks.

Odds can change very quickly, sometimes even updating while events are in-play. Our reviews and guides are used by more than , players worldwide every year. We put gambling sites through a solid reviews process that can sign off on all aspects of security, banking, software and games. We'll only ever list fully licensed and trusted sites that have proven their safety and fairness records to the likes of:. Home Casino Sports Betting Poker.

Similarly, you may subtract the number of unfavorable outcomes from the total number of outcomes to find the number of favorable outcomes.

Generally, odds are expressed as the ratio of favorable outcomes to unfavorable outcomes, often using a colon. In our example, our odds of success would be 2: Like a fraction, this can be simplified to 1: This ratio is written in words as "one to two odds. In fact, we have a one-third chance of winning. Remember when expressing odds that odds are a ratio of favorable outcomes to unfavorable outcomes - not a numerical measurement of how likely we are to win.

Know how to calculate odds against an event happening. What if we want to know the odds of losing, also called the odds against us winning? To find the odds against us, simply flip the ratio of odds in favor of winning. Remember, as above, that this isn't an expression of how likely you are to lose, but rather the ratio of unfavorable outcomes to favorable outcomes. How do you like those odds? Know the difference between odds and probability.

The concepts of odds and probability are related, but not identical. Probability is simply a representation of the chance that a given outcome will happen. This is found by dividing the number of desired outcomes over the total number of possible outcomes. It's easy to convert between probability and odds. Subtract the numerator 5 from the denominator The answer is the number of unfavorable outcomes. Odds can then be expressed as 5: Add the numerator 9 and denominator The answer is the total number of outcomes.

Differentiate between dependent and independent events. In certain scenarios, odds for a given event will change based on the results of past events. For example, if you have a jar full of twenty marbles, four of which are red and sixteen of which are green, you'll have 4: Let's say you draw a green marble.

If you don't put the marble back into the jar, on your next attempt, you'll have 4: Then, if you draw a red marble, you'll have 3: Drawing a red marble is a dependent event - the odds depend on which marbles have been drawn before. Independent events are events whose odds aren't effected by previous events.

Flipping a coin and getting a heads is an independent event - you're not more likely to get a heads based on whether you got a heads or a tails last time. Determine whether all outcomes are equally likely. If we roll one die, it's equally likely that we'll get any of the numbers 1 - 6. However, if we roll two dice and add their numbers together, though there's a chance we'll get anything from 2 to 12, not every outcome is equally likely.

There's only one way to make 2 - by rolling two 1's - and there's only one way to make 12 - by rolling two 6's. By contrast, there are many ways to make a seven. For instance, you could roll a 1 and a 6, a 2 and a 5, a 3 and a 4, and so on. In this case, the odds for each sum should reflect the fact that some outcomes are more likely than others.

Let's do an example problem. To calculate the odds of rolling two dice with a sum of four for instance, a 1 and a 3 , begin by calculating the total number of outcomes.

Each individual dice has six outcomes. Take the number of outcomes for each die to the power of the number of dice: Next, find the number of ways you can make four with two dice: So the odds of rolling a combined "four" with two dice are 3: Your odds of rolling a "yahtzee" five dice that are all the same number in one roll are very slim - 6: Take mutual exclusivity into account.

Sometimes, certain outcomes can overlap - the odds you calculate should reflect this. For instance, if you're playing poker and you have a nine, ten, jack, and queen of diamonds in your hand, you want your next card either to be a king or eight of any suit to make a straight , or, alternatively, any diamond to make a flush.

Let's say the dealer is dealing your next card from a standard fifty-two card deck. There are thirteen diamonds in the deck, four kings, and four eights. The thirteen diamonds already includes the king and eight of diamonds - we don't want to count them twice. Thus, the odds of being dealt a card that will give you a straight or flush are In real life, of course, if you already have cards in your hand, you're rarely being dealt cards from a complete fifty-two card deck.

Keep in mind that the number of cards in the deck decreases as cards are dealt. Also, if you're playing with other people, you'll have to guess what cards they have when you're estimating your odds. This is part of the fun of poker. Know common formats for expressing gambling odds. A parlay of riskier bets more underdogs will pay greater than a parlay of more likely bets more favorites. Although the rules to win his bet are the same as a parlay, he is paid less than a regular parlay due to the increased odds of winning.

A sports book may choose to buy in-play futures wagers at a price below the actual payout before a championship is decided if the potential payout is very high and thus, damaging to the sports book due to the money that may be lost. The bookmaker functions as a market maker for sports wagers, most of which have a binary outcome: The bookmaker accepts both wagers, and maintains a spread the vigorish which will ensure a profit regardless of the outcome of the wager. Bookmakers usually hold an advantage over their customers—for small wagers it is closer to a advantage—so the bookmaker will most likely survive over the long term.

Successful bookmakers must be able to withstand a large short term loss. Many of the leading gambling bookmakers from the s to the s got their start during the prohibition era of the s. They were often descendants of the influx of immigrants coming into the USA at this time.

Although the common stereotype is that these bookies were of Italian descent, many leading bookies were of eastern European ancestry. Odds for different outcomes in single bet are presented either in European format decimal odds , UK format fractional odds , or American format moneyline odds. European format decimal odds are used in continental Europe, Canada, and Australia.

They are the ratio of the full payout to the stake, in a decimal format. Decimal odds of 2. UK format fractional odds are used by British bookmakers. US format odds are the amount won on a stake when positive and the stake needed to win when negative. US odds of are an even bet.

In Asian betting markets, other frequently used formats for expressing odds include Hong Kong, Malaysian, and Indonesian-style odds formats. Odds are also quite often expressed in terms of implied probability , which corresponds to the probability with which the event in question would need to occur for the bet to be a break-even proposition on the average. In setting odds , the bookmaker is subject to a number of limitations: In many countries, bookmaking the profession of accepting sports wagers is regulated but not criminalized.

In areas where sports betting is illegal, bettors usually make their sports wagers with illicit bookmakers known colloquially as "bookies" and on the Internet , where thousands of online bookmakers accept wagers on sporting events around the world. The National Football League is fully against any sort of legalization of sports betting, strongly protesting it as to not bring corruption into the game.

On the other hand, the CEO of the International Cricket Council believe sports betting, in particular in India, should be legalized to curb illegal bookies where match fixing has occurred from nontransparent bookmakers. Many of the illegal proceeds also allegedly go to fund terror, drugs and other illegal activities. In the United States, it was previously illegal under the Professional and Amateur Sports Protection Act of for states to authorize legal sports betting, hence making it effectively illegal.

The states of Delaware , Montana , Nevada , and Oregon —which had pre-existing sports lotteries and sports betting frameworks, were grandfathered and exempted from the effects of the Act.

In addition, there was a significant gender split: Age proved to be a divide: As always, a lot depends on who actually shows up to vote. Donald Hoover, FDU professor in International School of Hospitality and Tourism Management and former casino executive commented on the results, "Betting on sports is not an uncommon practice for many New Jerseyans, but for the most part, the state doesn't supervise it, doesn't tax it and doesn't take any revenue from it.

Woolley commented on the results, "If some states allow sports betting and profit by it, other states will want to follow. He announced on May 24, that he planned to go ahead and set up a system of wagering at the state's racetracks and casinos that fall, before the National Football League season ended. In , despite federal law preventions, the state legislature of New Jersey and Governor Chris Christie signed a law that would allow sports betting to take place in New Jersey race tracks and Atlantic City casinos.

Voters were asked whether New Jersey should allow sports betting even if federal law prevents it from doing so, or wait to allow sports betting until federal law permits it. Krista Jenkins, director of the poll, commented, "Although support is not overwhelming, these numbers suggest the public is cautiously behind the goal of moving forward with legalized sports betting. In May , the Supreme Court ruled in the case in favor of New Jersey, ruling that the federal ban on sports betting in most states violated their rights.

On June 5, , Delaware became the second state after Nevada to implement full-scale sports betting. Sports betting in the state is run by the Delaware Lottery and is available at the state's three casinos. Prior to , the state offered limited sports betting consisting of parlay betting on NFL games. Delaware had been granted a partial exemption from the sports betting ban as it had made a failed attempt at legalized sports betting in Phil Murphy signing the legislation into law.

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