| A | B |
| event | something that might happen |
| probability | the chance that an event will happen |
| likely | good chance of happening |
| unlikely | does not have a good chance of happening |
| impossible | will never happen |
| certain | it will always happen |
| outcome | possible result |
| equally likely | same chance of happening |
| experiment | a test you can do to find out something |
| combination | result of joining 2 or more things |
| tree diagram | can use this to find possible combinations |