If a Manager Adopted Both Project a and Project B

Multiple Choice

If a manager adopted both project A and project B simultaneously,the variance in returns associated with this joint project would be:
$$\begin{array} { | l | l | l | } \hline \text { Praject } & \begin{array} { l } \text { Bomn } \\( 25 \% ) \end{array} & \begin{array} { l } \text { Recessim } \\( 75 \% ) \end{array} \\\hline \text { A } & \$ 30 & - \$ 15 \\\hline \text { B } & - \$ 15 & \$ 20 \\\hline\end{array}$$

A) 18.75.
B) 75.
C) 30.
D) 500.