\[P\left( \overline{A} \bullet \overline{B} \right) = P\left( \overline{A} \right) \bullet P\left( \overline{B} \right) =\]
\[= \left( 1 - P(A) \right)\left( 1 - P(B) \right) =\]
\[= (1 - 0,02)(1 - 0,3) =\]
\[= 0,98 \bullet 0,7 = 0,686.\]
\[Ответ:\ \ 68,6\%.\]