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Math
Probability AND / OR
Independent and mutually exclusive events
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Parameters
Results
- P(A and B)
- 10%
- P(A or B)
- 55%
How it works
Calculate combined probabilities for AND and OR of events.
Who it's for: Probability students distinguishing independent and mutually exclusive cases.
Independent AND: P(A and B) = P(A)·P(B).
Mutually exclusive OR: P(A or B) = P(A) + P(B).
Independent OR: P(A or B) = P(A) + P(B) − P(A)·P(B).
How to use
- Select event type: independent or mutually exclusive.
- Enter P(A) and P(B).
- Read the combined AND and OR probabilities.