Key Concepts

• Tree diagrams are helpful for calculating probabilities involving independent events or conditional probabilities.
• Venn diagrams are helpful for calculating probabilities involving mutually exclusive events.

Glossary

tree diagram: the useful visual representation of a sample space and events in the form of a “tree” with branches marked by possible outcomes together with associated probabilities (frequencies, relative frequencies)

Venn diagram: the visual representation of a sample space and events in the form of circles or ovals showing their intersections