Addition and multiplication rules


Assignment:

It can be easy enough to get the addition rule and the multiplication rule confused. Tell me the difference between the two.

Addition Rule:
Notation for Addition Rule: P(A or B) = P(event A occurs or event B occurs or they both occur).

Multiplication Rule:
Notation:  P(A and B) = P(event A occurs in a first trial and event B occurs in a second trial).

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Basic Statistics: Addition and multiplication rules
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