\[1)\ P\left( \text{AB} \right) = P(A) \bullet P(B) =\]
\[= \frac{3}{2 + 3 + 5} \bullet \frac{5}{2 + 3 + 5} =\]
\[= \frac{3}{10} \bullet \frac{5}{10} = \frac{15}{100} = \frac{3}{20} = 0,15.\]
\[Ответ:\ \ 0,15.\]
\[2)\ P\left( \text{AB} \right) = P(A) \bullet P(B) =\]
\[= \frac{5}{2 + 3 + 5} \bullet \frac{2}{2 + 3 + 5} =\]
\[= \frac{5}{10} \bullet \frac{2}{10} = \frac{10}{100} = \frac{1}{10} = 0,1.\]
\[Ответ:\ \ 0,1.\]