Probability Calculator
Calculate basic, conditional, and Bayes' probability with step-by-step solutions
Frequently Asked Questions
What is Bayes' theorem?
Bayes' theorem: P(A|B) = P(B|A) × P(A) / P(B). It calculates the probability of A given B using prior probabilities.
What is conditional probability?
P(A|B) is the probability of A given B has occurred. Formula: P(A|B) = P(A∩B) / P(B).
What is the addition rule?
P(A∪B) = P(A) + P(B) - P(A∩B). For mutually exclusive events, P(A∪B) = P(A) + P(B).