## Independent Events

Two outcomes are ** independent** if the occurrence of one outcome has no effect on the occurrence of the other. For example, if a coin is tossed twice, the first outcome (H or T) has no effect on the second outcome (H or T).

There are two ways multiple events can take place in a single probability problem: either they can each occur separately (A *or* B) or they must occur together (A *and* B).