\[\boxed{\mathbf{214.}}\]
\[\textbf{а)}\ P = \frac{5}{6} \cdot \frac{1}{6} = \frac{5}{36} \approx 0,139.\]
\[\textbf{б)}\ P = \frac{5}{6} \cdot \frac{5}{6} \cdot \frac{1}{6} = \frac{25}{216} \approx 0,116.\]
\[\textbf{в)}\ \left( \frac{5}{6} \right)^{5} \cdot \frac{1}{6} = \frac{5^{5}}{6^{6}} =\]
\[= \frac{3125}{46656} \approx 0,067.\]
\[\textbf{г)}\ Больше\ 4\ бросков:\]
\[\left( \frac{5}{6} \right)^{4} = \frac{625}{1296} \approx 0,482.\]
\[Не\ более\ 4\ бросков:\]
\[P = 1 - 0,482 \approx 0,518.\]