\[\boxed{\mathbf{225.}}\]
\[\textbf{а)}\ УНУН;\]
\[Р = \frac{1}{6} \cdot \frac{5}{6} \cdot \frac{5}{6} \cdot \frac{1}{6} = \frac{25}{1296} \approx 0,019.\]
\[\textbf{б)}\ НУНН;\]
\[Р = p \cdot q^{3} = \frac{1}{6} \cdot \left( \frac{5}{6} \right)^{3} =\]
\[= \frac{125}{1296} \approx 0,096.\]
\[\textbf{в)}\ УУНУ;\]
\[Р = p^{3} \cdot q = \left( \frac{1}{6} \right)^{3} \cdot \frac{5}{6} =\]
\[= \frac{5}{1296} \approx 0,004.\]