Event

Definition

An event is a specific outcome or a set of outcomes of a random experiment. Events are subsets of the sample space.

5 Must Know Facts For Your Next Test

1. Events can be simple (single outcome) or compound (multiple outcomes).
2. The probability of an event is always between 0 and 1, inclusive.
3. Mutually exclusive events cannot occur at the same time.
4. The complement of an event A, denoted as A', represents all outcomes not in A.
5. For any two events A and B, the union (A ∪ B) represents outcomes in either A or B or both.

Review Questions

• What is the difference between a simple event and a compound event?
• How do you find the probability of mutually exclusive events?
• What does the complement of an event represent?

Related terms

Sample Space:

The set of all possible outcomes in a random experiment.

Mutually Exclusive Events:

Two events that cannot occur at the same time.

Union of Events: The set containing all outcomes that are in either of two or more events.