Chapter 6.2.2 Probability Models 2

• The event (A U B), read A union B, is the set of all outcomes that are either in A or in B.
• The symbol Ø is used for the empty set.
• The event (A ∩ B), read A intersect B, is the set of all outcomes that are in both A or B.
• If two events A and B are disjointed, (A ∩ B)=Ø, read A intersects B is empty.

Exercises: 6.19-6.24