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.
Probability of A occuring 3 times

Probability of A NOT occuring

Probability of A occuring

Probability of B occuring 4 times

Probability of B NOT occuring

Probability of B occuring

Probability of A occuring 3 times and Probability of B occuring 4 times

Probability of neither A nor B occuring:

Probability of both A and B occuring:

Probability of A occuring 3 times but not B:

Probability of B occuring 4 times but not A:

Probability of A occuring but not B:

Probability of B occuring but not A:

Calculations are for guidance only. Seek independent financial advice.

If you are in need of advice about your money and you live in the UK then you may contact the Money Advice service over the phone or via chat for impartial advice.

You can also contact the debt charity “Step Change” if you are in debt and need help.

John has 22 years of experience in financial services. This spans across financial research, financial services (As a qualified mortgage broker and underwriter), financial trading and sales at global investment banks. While working as a publishing research analyst, he covered European bank credit and advised institutional clients on investment strategies at both JP Morgan and Societe Generale. John has passed all three levels of the CFA (Chartered Financial Analyst) programme.

John has 22 years of experience in financial services. This spans across financial research, financial services (As a qualified mortgage broker and underwriter), financial trading and sales at global investment banks. While working as a publishing research analyst, he covered European bank credit and advised institutional clients on investment strategies at both JP Morgan and Societe Generale. John has passed all three levels of the CFA (Chartered Financial Analyst) programme.