PoissonDistribution

PoissonDistribution[μ] represents a Poisson distribution with mean μ.

Examples

Random samples:

RandomVariate[PoissonDistribution[5], 10]
(* {4, 6, 5, 3, 7, 5, 4, 6, 5, 3} *)

Probability mass function:

PDF[PoissonDistribution[3], 2]
(* 9 E^-3 / 2 *)

Please visit the official Wolfram Language Reference for more details.