### Introduction

The hypergeometric distribution enables us to deal with situations arising when we sample from batches with a known number of defective items. In essence, the number of defective items in a batch is not a random variable - it is a known, fixed, number.

#### Prerequisites

• understand the concepts of probability
• understand the notation ${}_{}^{n}{C}_{r}$ used in probability calculations

#### Learning Outcomes

• apply the hypergeometric distribution to simple examples