# Glossary

## Independent events

Two events $A$ and $B$ are independent if the probability of one event does not influence the probability of the other. More formally, for $A$ and $B$ to be independent, we require that $\mathrm{Pr}(A \textrm{ and } B)$ is equal to $\mathrm{Pr}(A) \times \mathrm{Pr}(B)$.