Free Probability (A U B) Calculator - Given a 2 event sample space A and B, this calculates the probability of the following events:

P(A U B)

P(A)

P(B)

P(A ∩ B)

This calculator has 4 inputs.

P(A U B)

P(A)

P(B)

P(A ∩ B)

This calculator has 4 inputs.

- intersection
- the set containing all elements of A that also belong to B or equivalently, all elements of B that also belong to A.

A ∩ B - probability
- the likelihood of an event happening. This value is always between 0 and 1.

P(Event Happening) = Number of Ways the Even Can Happen / Total Number of Outcomes - probability (a u b)
- sample space
- the set of all possible outcomes or results of that experiment.
- union
- Combine the elements of two or more sets