(related to Definition: Laplace Experiments and Elementary Events)
Let \(\Omega=\{\omega_1,\omega_2,\ldots,\omega_n\}\) be the finite probability space of a given Laplace experiment. Then
\[p(\omega_i)=\frac 1n~~~~~~~~~~~~(i=1,\ldots n).\]
For any event \(A\subseteq\Omega\), we have
\[p(A)=\frac{\text{# possible outcomes of }A}{\text{# possible outcomes of }\Omega}=\frac {|A|}{|\Omega|}.\]
Proofs: 1