§ Задание 283
\[\boxed{\mathbf{283.}}\]
\[P(b + c) = 0,83;\]
\[P(a) + P(b + c) = 1\]
\[P(a) + 0,83 = 1\]
\[P(a) = 1 - 0,83 = 017.\]
\[Ответ:0,17.\]
\[\boxed{\mathbf{283.}}\]
\[P(b + c) = 0,83;\]
\[P(a) + P(b + c) = 1\]
\[P(a) + 0,83 = 1\]
\[P(a) = 1 - 0,83 = 017.\]
\[Ответ:0,17.\]