Did you know that the great majority of people have more than the average number of legs? It's obvious really; amongst the 57 million people in Britain there are probably 5,000 people who have got only one leg. Therefore the average number of legs is:
((5000 * 1) + (56,995,000 * 2)) / 57,000,000 = 1.9999123
Since most people have two legs...
*Thanks to Joachim Verhagen's Science Jokes for this play upon numbers.