compound event	an event with more than one outcome
equally likely	having the same likelihood of occurring, such that in a large number of trials, two equally likely outcomes would happen roughly the same number of times
event	a collection of possible outcomes, often describable using a common characteristic, such as rolling an even number with a die or picking a card from a specific suit
event space	the set of possible outcomes in an event: for example, the event “rolling an even number” on a die has the event space of 2, 4, and 6
Fundamental Counting Principle	a way to find the number of outcomes in a sample space by finding the product of the number of outcomes for each element
outcome	a result of a trial
probability	a measure of how likely it is that something will occur
random	unable to be predicted with certainty
sample space	the set of all outcomes
simple event	an event with only one outcome
tree diagram	a diagram that shows the choices or random outcomes from multiple elements, using branches for each new element
trial	a random action or series of actions