Probability Calculator
Probability of single events plus union/intersection and complement for two events.
How to Use
- Enter favorable and total outcomes for A and B.
- Toggle independence for intersection formula.
Events
Result
Formulas
Single event
P(A) = favorable / total
Intersection
independent: P(A)·P(B) · else conditional
Union
P(A ∪ B) = P(A) + P(B) − P(A ∩ B)
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