Najwa and Zuki play a game.
They put two red and four blue ribbons in a box. They pull out two ribbons at the same time without looking at the colours.
Najwa wins if both ribbons are the same colour.
Zuki wins if the two ribbons are different colours.
You could play the game. Make ribbons from coloured strips of paper, and put them in a bag or box so players can take one strip without seeing what colour they are taking.
Who wins more often? Is this a fair game? If not, why is it unfair?
List all the different possible events that can happen each time you play this game, for example (red and red) …
Now suppose that you change the game so that there are two red and four blue ribbons in the box?
Is this a fair game? Why or why not?
Also see www.nrich.maths.org/919