Mzo picks one marble from each bag at random.
- What is the probability he picks one of each colour?
- What is the probability he does NOT pick a red?
Start with an experiment. You could just use bits of paper folded so you can’t see the colours and you don’t need bags. Then work it out theoretically.
How close were the experimental and theoretical results?
What happens if you add up all the results for the whole class?