Consider the following simple example, namely the tossing of a dice, resulting in the following possible values $$ \begin{equation*} \{2,3,4,5,6,7,8,9,10,11,12\}. \end{equation*} $$ These values are called the domain. To this domain we have the corresponding probabilities $$ \begin{equation*} \{1/36,2/36/3/36,4/36,5/36,6/36,5/36,4/36,3/36,2/36,1/36\}. \end{equation*} $$