Math Calculators, Lessons and Formulas

It is time to solve your math problem

mathportal.org

Probability calculator

google play badge app store badge

This calculator computes probability of selected event based on probability of other events. The calculator generates solution with detailed explanation.

Probability Calculator
For dependent events enter 3 values. For independent events input 2 values.
help ↓↓ examples ↓↓
I want to calculate:
Input values you know
P( A )
=
P( B )
=
P( A and B )
=
P( A or B )
=
P( A | B )
=
P( B | A )
=
Hide steps
working...
examples
example 1:ex 1:

A single card is chosen from a deck of 52 playing cards. What is the probability of choosing an ace or a heart?

example 2:ex 2:

A fair six sided die is rolled. What is the probability of rolling a number divisible by 3 or an even number?

Search our database with more than 250 calculators
439 065 011 solved problems