There are 12people. Each person buys 1 present each andwraps it and puts it under the tree (each person will know what present theywrapped).

All names of the 12people go into a hat. The first persondrawn has the option to pick a present from under the tree (whilst there are 12presents – you know your one, so you have 11 to pick from)

This goes on with therest of the people.

What are the chancesof the last person being left with their present that they wrapped.