Изменения

P(B) = \genfrac{}{}{}{0}{1}{6} \cdot(\genfrac{}{}{}{0}{5}{6})+ \genfrac{}{}{}{0}{1}{6} \cdot(\genfrac{}{}{}{0}{5}{6})^{3} + \genfrac{}{}{}{0}{1}{6}\times cdot (\genfrac{}{}{}{0}{5}{6})^{5} ... = \genfrac{}{}{}{0}{5}{11}.