# Axioms of Probability

From Elsmar Cove Quality Assurance and Business Standards Wiki

There are three axioms of probability:

(1) chances are always at least zero.

(2) The chance that something happens is 100%.

(3) If two events cannot both occur at the same time (if they are disjoint or mutually exclusive), the chance that either one occurs is the sum of the chances that each occurs.

## See also

Related Elsmar Cove Forum Probability Feedback Discussion Threads

== References ==