What is the conditional probability or probability of classes of languages?

Let $E,C,S,F,R $ be the class of computably enumerable languages,computable languagesl,context-sensitive anguages,context-free languages and regular languages respectively. $E$ is class of all computably enumerable languages and it's subset of $E$ is the Cantor space,take the uniform probability measure on the Cantor space,then what is the probability or conditional probability $P(C),P(S),P(F),P(R),P(S|C),P(F|C),P(R|C),\cdots,P(R|F)$ ?suppose L is selected randomly under the fair-coin (Lebesgue-Cantor) measure on $2^{\omega}$.