\[\boxed{\mathbf{42.}}\]
\[\textbf{а)}\ P\left( \overline{K} \right) = 1 - 0,4 = 0,6.\]
\[\textbf{б)}\ P\left( \overline{K} \right) = 1 - 0,85 = 0,15.\]
\[\textbf{в)}\ P\left( \overline{K} \right) = 1 - 0,13 = 0,87.\]
\[\textbf{г)}\ P\left( \overline{K} \right) = 1 - 0,5 = 0,5.\]