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Conditional Probability & Bayes' Theorem Calculator

Calculate simple probability, complement, union, intersection, conditional probability, and Bayes' theorem.

Favorable Outcomes n(E)Number of favorable outcomes (must be a non-negative integer)

Total Outcomes n(S)Total number of possible outcomes (must be a positive integer)

Formula Being Calculated

P(E)=n(E)n(S)=310

Enter values and click Calculate.

Quick Reference:

P(E): favorable / total
P(A∪B): P(A) + P(B) - P(A∩B)
P(B|A): P(A∩B) / P(A)

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