Counting Outcomes

Favourable over total

An interactive lesson with 7 steps, about 6 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• For equally likely outcomes, $P = \frac{\text{favourable}}{\text{total}}$.
• Make sure the outcomes you count really are equally likely (HT and TH are different outcomes).
• With two dice, 7 is the most likely total (6 ways out of 36).

Steps

1. Two coins
2. Check it by experiment
3. Roll a die
4. Two dice
5. Lucky seven
6. Six or eight?
7. High roller