### Roll These Dice

Roll two red dice and a green dice. Add the two numbers on the red dice and take away the number on the green. What are all the different possibilities that could come up?

### Trick or Treat

Mrs. Smith had emptied packets of chocolate-covered mice, plastic frogs and gummi-worms into a cauldron for treats. What treat is Trixie most likely to pick out?

### A Bit of a Dicey Problem

When you throw two regular, six-faced dice you have more chance of getting one particular result than any other. What result would that be? Why is this?

# Bipin's Choice

### Why do this problem?

Probability is a difficult concept and questions such as this, which invites discussion, can help children to get to grips with the difference between a calculated result (theoretical probability) and what actually happens (experimental probability). Playing the game with a bag full of coloured balls can help to make the link.

### Key questions

The first ball taken out is a red one, how many balls of each colour are left?
What is the chance of picking another red ball?
What is the chance of of picking a yellow ball?
If you had won some money and could lose it by playing again, would you stop playing? Why?

### Possible extension

Make up a similar question with different numbers of coloured balls. Are there any combinations of colours that would make it clear what to do? Why?

### Possible support

Playing the game with a bag full of coloured balls and discussing the possible outcomes can help to make the link. Talk is really important in understanding probability.