Probability of Two Events

To find out the union, intersection, and other related probabilities of two independent events.

Probability of A: P(A)
Probability of B: P(B)

Probability Solver for Two Events

Please provide any 2 values below to calculate the rest probabilities of two independent events.

Probability of A: P(A)
Probability of B: P(B)
Probability of A NOT occuring: P(A')
Probability of B NOT occuring: P(B')
Probability of A and B both occuring: P(A∩B)
Probability that A or B or both occur: P(A∪B)
Probability that A or B occurs but NOT both: P(AΔB)
Probability of neither A nor B occuring: P((A∪B)')

Probability of a Normal Distribution

Use the calculator below to find the area P shown in the normal distribution, as well as the confidence intervals for a range of confidence levels.

Mean: (µ)
Standard Deviation (σ):
Left Bound (Lb):		For negative infinite, use -inf
Right Bound (Rb):		For positive infinite, use inf