If you select 20 random countries from the world map like in this quiz, what is the chance you get each amount of countries from each continent?
If we pick 20 random countries from the Countries of the World we have a 95% chance of a border between them. Does this chance change if we fix one of the countries and randomly select the other 19?
Pick 20 random countries from the Countries of the World Quiz. What is the chance there is one border between them? Or two? Or none at all? That is what is shown in this graph! Note that since this is a random process, sets of 20 countries with even more borders exist. They are just even rarer.