Glossary · Phase 2 · Math, when you need it
Mutually exclusive
Events that can't both happen at once, like a die showing 2 and showing 5. Their chances simply add.
Try it now
Work out "none" first, then take it away from 1. Note that it's far less than just adding the chances.
Learn it properly
Probability basics · Events, outcomes and the rules for combining them. About 25 minutes.
Other terms from the same lesson
- complement: Everything except the event: the chance something does not happen is 1 minus the chance it does.
- independent: Two events are independent when one happening doesn't change the chance of the other, like two separate coin flips.
- probability: How likely something is, from 0 (never) to 1 (certain).
- seed: A starting number for a random generator. The same seed gives the same "random" numbers every run, so results can be repeated.
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