There are different kinds of averages. Most people say 'average' when they mean 'mean', which
is defined as sum(x)/n. The median is the value that half the people are dumber than, as rw2 explained above. Another kind of average is the 'mode' which is the value with the highest frequency.
Those are all the averages I know about. Are there others? Do all their names start with 'm'?

Molly