Discrete Random Variable Calculator

Online probability calculator to find expected value E(x), variance (σ2 ) and standard deviation (σ) of discrete random variable from number of outcomes.

Find E(x), σ2 & σ Value - Probability Calculator

 Number of outcomes   =
 
 
 
Expected Value (E(x)) =
Variance (σ2) =
Standard Deviation (σ) =

Note : Number of outcomes must be greater than 1
Sum of probabilities must be equal to 1
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Discrete Random Variable's expected value,variance and standard deviation are calculated easily.

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