Chris and Jo decide to play a game. They put some red and some blue
ribbons in a box.
They each pick a ribbon from the box
without looking (and without replacing
them).
Jo wins if the two ribbons are the same
colour and Chris wins if the two ribbons
are a different colour.
How many ribbons of each colour would you need in the box to make it a
fair game?
Is there more than one way to make a fair game?