Probability Calculator
Calculate probability for single events, multiple events, conditional probability, combinations (nCr), and permutations (nPr). Free probability calculator.
Probability Formulas
Basic: P(A) = favorable outcomes / total outcomes
Union: P(A∪B) = P(A) + P(B) - P(A∩B)
Independent: P(A∩B) = P(A) × P(B)
Conditional: P(A|B) = P(A∩B) / P(B)
Complement: P(A') = 1 - P(A)
Combinations: C(n,r) = n! / (r!(n-r)!)
Permutations: P(n,r) = n! / (n-r)!
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