Math
Probability Calculator
Union, intersection, and complement of two events (assumes independence for A ∩ B).
Inputs
Probability Calculator
Result
P(A ∩ B) (independent)
12.0000%
- P(A ∪ B)
- 58.0000%
- P(A')
- 60.0000%
- P(B')
- 70.0000%
- P(A|B) if independent
- 40.0000%
How it's calculated
P(A ∪ B) = P(A) + P(B) − P(A ∩ B). For independent events: P(A ∩ B) = P(A) · P(B).
Related calculators
Math
Z-Score Calculator
Z-score of a value in a normal distribution, plus its cumulative probability.
Math
Permutation & Combination
Compute nPr (arrangements) and nCr (selections) for two integers n and r.
Math
Percentage Calculator
What is X% of Y, X is what % of Y, and percentage change — all in one place.
Math
Percent Change Calculator
Percentage increase or decrease between two numbers.