Exclusive events and the OR rule
Pages
Mutually exclusive events
Events that cannot both happen on one trial, and testing pairs for exclusivity.
The OR rule for exclusive events
Adding probabilities for either-or questions, and why exclusivity is required.
Exhaustive sets of events
Sets of events covering every outcome, and when their probabilities total one.
Events that overlap
Why adding double-counts the overlap, and subtracting it to correct the total.
Practice
Practice
Mutually exclusive events
Events that cannot both happen on one trial, and testing pairs for exclusivity.
PracticeThe OR rule for exclusive events
Adding probabilities for either-or questions, and why exclusivity is required.
PracticeEvents that overlap
Why adding double-counts the overlap, and subtracting it to correct the total.
PracticeThe AND and OR rules review
Independent and dependent events, and when to multiply or add.