What Is the Expected Return on Portfolio Which Is Invested

Multiple Choice

What is the expected return on portfolio which is invested 20% in share A, 50% in share B, and 30% in share C?
$\begin{array} { | l | l | l | l | l | } \hline & & \multicolumn{3}{|l|} { \text { Rate of Return if State Occurs } } \\\hline \text { State of Economy } & \text { Probability of State of Economy } & \text { Share A } & \text { Share B } & \text { Share C } \\\hline \text { Boom } & 20 \% & 18 \% & 9 \% & 6 \% \\\hline \text { Normal } & 70 \% & 11 \% & 7 \% & 9 \% \\\hline \text { Recession } & 10 \% & - 10 \% & 4 \% & 13 \% \\\hline\end{array}$

A) 7.40%
B) 8.25%
C) 8.33%
D) 9.45%
E) 9.50%