LCHL Rules of Probability

These lessons will involve the students in investigating and understanding:

 The use of set theory to discuss experiments, outcomes, sample spaces

 The basic rules of probability (AND/OR), mutually exclusive events, through the use of Venn diagrams

 The use of the formulae:

• Addition Rule (for mutually exclusive events only): P(A U B) = P(A) + P(B)

• Addition Rule (General Case): P(A U B) = P(A) + P(B) − P(A ∩ B)

• Multiplication Rule (Independent Events): P(A ∩ B) = P(A) × P(B)

• Multiplication Rule (General Case): P(A ∩ B) = P(A) × P (B | A)

 The use of tree diagrams