Each bag below has lots of counters in it, coloured either blue or yellow.
In this game you choose a bag, and remove one counter at random. If you get a blue counter you win £20, if you get a yellow counter you don’t win.
But there are some additional rules:
If you choose Bag A you get a guaranteed chocolate bar regardless of what counter you draw.
If you choose Bag B you don’t get a chocolate bar, but you do get a 50% higher chance of getting a blue counter.
