Conditional Probabilities

\begin{displaymath} \Pr(\mbox{\rm happy}\vert \mbox{\rm hungry}) = 0.02.\end{displaymath}

\begin{displaymath} \Pr(AB) = \Pr(A) \Pr(B\vert A)\end{displaymath}

\begin{displaymath} \Pr(B\vert A) = \Pr(AB) / \Pr(B)\end{displaymath}

\epsfig {file=l1201.ps,height=3in,angle=270}

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