A ratio that measures the chance that an event will happen Define Probability A ratio that measures the chance that an event will happen

Outcome: one of the possible results of an experiment Define Outcome Outcome: one of the possible results of an experiment

Event: a possible choice resulting in an outcome Define Event Event: a possible choice resulting in an outcome

Fundamental Counting Principle Multiply the ways each event can happen to find the way events can happen together.

One event does not effect the other event Independent Events One event does not effect the other event

Tree Diagram A way of showing outcomes of independent events

Compound Event Compound Event: An event that consists of two, or more, simple events.

Compound Event continued  Some compound events do not affect each other's outcomes, such as throwing a die and tossing a coin.