Let $X \in \mathsf{Random}[0, \infty]$ be a D5101: Random unsigned basic number.
Let $\lambda > 0$ be a D993: Real number.
Let $\lambda > 0$ be a D993: Real number.
Then
\begin{equation}
\mathbb{E}(X)
\geq \lambda \mathbb{P}(X \geq \lambda)
\end{equation}