\[\boxed{\mathbf{297.}}\]
\[Всего\ событий:\]
\[N = 2 \cdot 3 + 3 \cdot 2 + 4 \cdot 1 = 16.\]
\[\textbf{а)}\ N(A) = 4;\]
\[P = \frac{4}{16} = \frac{1}{4} = 0,25.\]
\[\textbf{б)}\ N(A) = 3 \cdot 2 = 6;\]
\[P = \frac{6}{16} = \frac{3}{8} = 0,375.\]
\[\textbf{в)}\ N(A) = 2 \cdot 3 = 6;\]
\[P = \frac{6}{16} = \frac{3}{8} = 0,375.\]