The Negative Binomial Equations

In this video, I explain the differences between the two Negative Binomial equations that can often cause confusion to students when they first encounter them. In addition, a Negative Binomial problem is solved with both equations to better understand their differences. Negative Binomial where x is the number of trials Negative Binomial where x is the number of failures Source of problem: Chapter 3, problem 76 Probability and Statistics for Engineering and the Sciences 9th Edition Jay L. Devore