POISSON.DIST (PQL  xl)
This function returns the number of possible permutations for a specified number of items
 Library: PQL \ Spreadsheet \ Statistical
 Compatibility: Any content (regardless of data source) in the Tabulate spreadsheet module
Syntax
POISSON.DIST(x, mean, cumulative)
Function Arguments
Name  Description  Type  Optional 
x  Number of events; provide an integer, or the value is truncated; the number must be greater than zero  Number 

mean  Expected numeric value; the number must be greater than zero  Number 

cumulative  Set to TRUE to return the cumulative Poisson probability that the number of random events occurring is between zero and nevents inclusive. Set to FALSE to return the Poisson probability mass function that the number of events occurring is exactly n events  Number 

Comments
This function is the same as the Microsoft Excel 'POISSON.DIST' function  using the same inputs, logic and outputs.