4: Discrete Random Variables Last updated Save as PDF Page ID 14634 OpenStax OpenStax 4.1: Introduction 4.2: Hypergeometric Distribution 4.3: Binomial Distribution 4.4: Geometric Distribution The geometric probability density function builds upon what we have learned from the binomial distribution. In this case the experiment continues until either a success or a failure occurs rather than for a set number of trials. 4.5: Poisson Distribution 4.6: Chapter Formula Review 4.7: Chapter Homework 4.8: Chapter Key Items 4.9: Chapter Practice 4.10: Chapter References 4.11: Chapter Review 4.12: Chapter Solution (Practice + Homework)