RandNegBinomial Parameters 
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$p=RandNegBinomial(required, probability, number)
Generates number random negative binomial trials. RandNegBinomial returns the number of attempts before required successes where the probability of success on each attempt is probability.
For example, how many rolls of a die does it take to roll a total of four 6's?
You can simulate this problem thirty times using $p=RandNegBinomial(4,1/6,30) and you might generate the following data.
19, 18, 23, 18, 14, 25, 52, 69, 17, 24, 21, 29, 12, 36, 52, 36, 17, 22, 8, 30, 8, 26, 11, 41, 18, 13, 41, 18, 30, 25
A RandNegBinomial parameter is regeneratable. Every time you regenerate, you will be provided with a fresh set of data.
A RandNegBinomial parameter can be used for statistical calculations in the inline calculator.
