Probability Calculator

Multiple Event Probability (X & Y are independent):

Number of possible outcomes:
Number of event occurs in X:
Number of event occurs in Y:

P(X): P(X’):
P(Y): P(Y’):
P(X ∩ Y): P(X U Y):
P(X/Y): P(Y/X):


Probability Calculator is a free online tool that displays the possible probability values for the given number of events. BYJU’S online probability calculator tool makes the calculation faster, and it displays the probability value in a fraction of seconds.

How to Use the Probability Calculator?

The procedure to use the probability calculator is as follows:

Step 1: Enter the number of events occur in X and Y, and the number of possible outcomes in the respective input field

Step 2: Now click the button “Solve” to get the result

Step 3: Finally, the different probability values will be displayed in the output field

What is Meant by Probability?

In mathematics and statistics, the Probability is used to measure the likelihood of an event which is going to occur. The probability is a number that always lies between 0 and 1.If the probability value is equal to 1, then something will always happen. If the probability value is equal to 0, then something will never happen. It is noted that the probability of all the events in the sample space always adds up to 1. The formula to calculate the probability of an event is given by

Probability of an Event P(E) = Number of Favourable Outcomes / Total Number of Outcomes


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