A D202: Random variable $X : \Omega \to \mathcal{X}$ is simple if and only if

(1)	$\{ X(\omega) : \omega \in \Omega \} \neq \emptyset$ is a D17: Finite set
(2)	\begin{equation} \forall \, x \in \mathcal{X} : \mathbb{P}(X = x) > 0 \end{equation}