Let’s begin with the big philosophical questions: have you ever wondered how unlikely (or likely) it is that there are aliens in our universe? Or the probability of another planet like Earth existing? What are the odds? What are the chances? How likely is it?

The chart below is based on the most common things people search for in Google about odds, chances and probabilities. We then researched to discover the odds of such events actually occurring.

The results reveal the things we wonder about and worry about, and just how unlikely (or likely) they are.

As well as being central to the odds shown in the above infographic, probability is also relevant to popular casino games such as online roulette or online blackjack.

For example, in roulette, an even bet has a 48.6 per cent chance of winning, while a single bet has just a 2.7 per cent chance of winning.  And in blackjack, there is just a 31 per cent chance of busting on 12, compared to a 62 per cent chance of busting at 16.

So, while the bet placed is in the player’s control, the outcome is always affected by the element of chance.

Whether the player ultimately wins or loses money depends on how they weigh their chances. To do this, they must calculate probabilities and wager accordingly.


Questions about odds and likelihoods were obtained from Google search suggestions for 4 seed phrases: "what are the odds", "what are the chances", "how likely", and "what is the probability".

The odds of the events in question were derived from statistics supplied by government agencies, professional bodies and associations, expert panels, academic studies, their coverage in the media, and industry publications.

The odds associated with games were calculated using WolphramAlpha.