At a College,70 Percent of the Students Are Women and 50

At a college,70 percent of the students are women and 50 percent of the students receive a grade of C.25 percent of the students are neither female nor C students.Use this contingency table.
$\begin{array} { l c l r } & \mathrm { C } & \overline { \mathrm { C } } & \\\text { Women } & .45 & .25 & .70 \\\text { Men } & .05 & .25 & .30 \\& .50 & .50 & 1.00\end{array}$

A) 0.45
B) 0.90
C) 0.70
D) 0.64
E) 0.50