Calculate various probability operations for events A and B
Calculate various probability operations for events A and B
Enter probabilities as decimals between 0 and 1 (e.g., 0.5 for 50%)
Our Probability Calculator helps you perform various probability operations including union, intersection, conditional probability, and Bayes theorem. These are fundamental concepts in probability theory and statistics.
Probability that either event A or event B occurs (or both).
Formula: P(A ∪ B) = P(A) + P(B) - P(A ∩ B)
Probability that both event A and event B occur simultaneously.
Formula: P(A ∩ B) = P(A) × P(B) (for independent events)
Probability that event A does not occur.
Formula: P(A') = 1 - P(A)
Probability of event A occurring given that event B has occurred.
Formula: P(A|B) = P(A ∩ B) / P(B)
Updates the probability of event B based on new information about event A.
Formula: P(B|A) = P(A|B) × P(B) / P(A)