Drills

Choosing and applying the addition and multiplication rules for combined events.

Author note — to cover

Fluency — the OR rule on exclusive events and the AND rule on independent events, applied one rule at a time with fraction answers (4 questions).
Choosing the rule — worded questions deciding between adding and multiplying, including an at-least-one found through the complement (4 questions).
Rule conditions — pairs of events that are not exclusive or not independent, where applying the rule anyway gives a probability that is visibly wrong (4 questions).

The test

—coming soon—

Where to go next

This mixed review uses the methods from these learning pages: