Number of Arms

We begin by assuming that almost everybody has 2 arms. Nobody has 3, but a small number of people have lost one or both arms in accidents or amputations. Here, we will ignore fractional arms - but you don't actually have to.

Measure	What it is	Value	More than this many arms
Mean	If all of the arms in the world were shared equally between all of the people	Just below 2	2
Median	The middle number, when everybody's number of arms is written in a long, ordered list: 0, ..., 0, 1, ..., 1, 2, ..........................................................., 2	2	3
Mode	The most common number of arms	2	3

The next person you meet will probably have 2 arms, and definitely won't have more.

So it is almost certain that they have more than the mean number of arms, but impossible that they have more than the median or modal number of arms.