Skuti Science Free scientific calculators & converters

Probability Calculator (Two Events)

Compute P(A and B), P(A or B), P(not A), P(A xor B) and conditional probabilities for independent events.

Results

P(A ∩ B)β€”
P(A βˆͺ B)β€”
P(Aβ€²)β€”
P(Bβ€²)β€”
P(A Ξ” B) exactly oneβ€”
P(neither)β€”

How to use the Probability Calculator

  1. Enter or select: P(A), P(B).
  2. The results (P(A ∩ B), P(A βˆͺ B), P(Aβ€²), P(Bβ€²), P(A Ξ” B) exactly one, P(neither)) are calculated instantly as you type.
  3. Use β€œCopy link” to share the calculation with the same input values.

Formula

  • P(A ∩ B) = P(A)Β·P(B) (independent)
  • P(A βˆͺ B) = P(A) + P(B) βˆ’ P(A ∩ B)