Probability of Two Events
Probability of A: P(A)
 
Probability of B: P(B)
 
 
Calculate
 

 
Probability of a Series of Events
Probability Repeat Times
Event (A)
Event (A)
 
 
Calculate
 
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 occuring but NOT B:

Probability of B occuring but NOT A:

Calculations are for guidance only. Seek independent financial advice.