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### Probability of an Event Formula

P(A)=Number of Favorable Outcomes/Total Number of Possible Outcomes
More formulas
Rule Of Three GO
Subtraction Of two number GO
Multiplication Of two numbers GO
Division Of two numbers GO
Semiperimeter Of Triangle GO
Area of Triangle when semiperimeter is given GO
Side a of a triangle GO
Cube Root of number GO
Square Root Of Number GO
Exponentiation GO
Combination Probability GO
Empirical Probability GO
Binomial Probability GO
Slope Of Line GO
side b of a triangle GO
side c of a triangle GO
Distance Between Line GO
Arc Length GO
Centroid of a Trapezoid GO
Factorial of a Number GO
Logarithm of a Number GO
Nth Root of a Number GO
Circumference of Circle GO
Diameter of a circle when circumference is given GO
Radius of a circle when circumference is given GO
Radius of a circle when area is given GO
Diameter of a circle when area is given GO
Radius of a circle when diameter is given GO
Diameter of a circle when radius is given GO
Inscribed angle when radius and length for minor arc are given GO
Inscribed angle when radius and length for major arc are given GO
Central angle when radius and length for major arc are given GO
Central angle when radius and length for minor arc are given GO
Side of a Kite when other side and area are given GO
Side of a Kite when other side and perimeter are given GO
Side of a Rhombus when Diagonals are given GO

## What is Probability of an Event?

In an experiment, the probability of an event is the likelihood of that event occurring. A gambler's dispute in 1654 led to the creation of a mathematical theory of probability by two famous French mathematicians, Blaise Pascal and Pierre de Fermat. Probability is a value between (and including) zero and one. If P(E) represents the probability of an event E, then: P(E) = 0 if and only if E is an impossible event while P(E) = 1 if and only if E is an certain event.

## How to Calculate Probability of an Event?

Probability of an Event calculator uses P(A)=Number of Favorable Outcomes/Total Number of Possible Outcomes to calculate the P(A), The probability of an event is the likelihood of that event occurring. P(A) and is denoted by P symbol.

How to calculate Probability of an Event using this online calculator? To use this online calculator for Probability of an Event, enter Number of Favorable Outcomes (n(E)) and Total Number of Possible Outcomes (n(S)) and hit the calculate button. Here is how the Probability of an Event calculation can be explained with given input values -> 0.9375 = 15/16.

### FAQ

What is Probability of an Event?
The probability of an event is the likelihood of that event occurring and is represented as P=n(E)/n(S) or P(A)=Number of Favorable Outcomes/Total Number of Possible Outcomes. Number of Favorable Outcomes is the number of times the outcome of interest comes and Total Number of Possible Outcomes is the total number of outcomes that may occur by performing some task.
How to calculate Probability of an Event?
The probability of an event is the likelihood of that event occurring is calculated using P(A)=Number of Favorable Outcomes/Total Number of Possible Outcomes. To calculate Probability of an Event, you need Number of Favorable Outcomes (n(E)) and Total Number of Possible Outcomes (n(S)). With our tool, you need to enter the respective value for Number of Favorable Outcomes and Total Number of Possible Outcomes and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well. Let Others Know