\[P(A + B) =\]
\[= P(A) + P(B) - P\left( \text{AB} \right) =\]
\[= P(A) + P(B) - P(A) \bullet P(B) =\]
\[= \frac{1}{6} + \frac{1}{6} - \frac{1}{6} \bullet \frac{1}{6} = \frac{2}{6} - \frac{1}{36} = \frac{11}{36}.\]
\[Ответ:\ \ \frac{11}{36}.\]