Select the default version of the geometric distribution and negative binomial distribution to use in Calc > Random
Data, Calc > Probability Distributions, and Graph > Probability Distribution
Plot. The changes you make to the defaults remain until you change them again, even after you exit Minitab.
Geometric Distribution and Negative Binomial Distribution
Model the total number of trials: Model the total number of trials that are needed to produce one event.
Model only the number of non-events: Model the number of nonevents that occur before one event occurs.