1. compound event 2. an organizing tool used to find the sample space for compound events a game in which each participant has the same probability of winning an event consisting of two or more events that can happen at the same time or one after the other counting principle 3. tree diagram sample space 4. the set of all possible outcomes for an experiment principle that states the number of outcomes for a compound 5. event is found by multiplying the total number of outcomes for each event together fair game​