If A and B are two events such that $P (A) = \large \frac{1}{4} , P (B) = \large\frac{1}{2} $ and $P(A \cap B) = \large \frac{1}{8} $ , find $P$ (not A and not B).

Question

$\begin{array}{1 1}3/8 \\ 1/8 \\ 1/4 \\ 5/8 \end{array} $