Mathematics: Analysis and Approaches · Topic 4: Statistics and probability

SL4.6 — Combined events and conditional probability

Mathematics: Analysis and Approaches · SL / HL · syllabus-mapped notes

1. Diagrams for probability

   Venn diagrams, tree diagrams, sample space diagrams and tables of outcomes.

2. Combined events and mutually exclusive events

   The addition rule P(A u B) = P(A) + P(B) - P(A n B) and when P(A n B) = 0.

3. Conditional probability

   Probability of A given B, and the multiplication rule.

4. Independent events and replacement

   Independence P(A n B) = P(A)P(B), and problems with and without replacement.