Def: __Union____ of
Events__—the union of events A and B is the collection of all outcomes that
belong either to A or to B or to both A and B.

·
P(A or B) or _{}.

· P(A or B) = P(A) + P(B) – P(A and B).

Examples (Power point slides—in handout packet).

Attribute Block Activity—

Twins, Etc.