\[\boxed{\mathbf{208.}}\]
\[\lbrack 2;5\rbrack:\]
\[\textbf{а)}\ a < 3:\]
\[P = \frac{1}{2} = 0,5.\]
\[\textbf{б)}\ b < 4:\]
\[P = 0,5.\]
\[\textbf{в)}\ P = 0,5.\]
\[\textbf{г)}\ P = 1.\]