Given the following information about the returns of stocks A, B, and C, what is the expected return of a portfolio invested 30% in stock A, 40% in stock B, and 30% in stock C?
State of economy Probability Stock A Stock B Stock C
Boom 0.12 0.2 0.23 0.37
Good 0.24 0.15 0.12 0.18
Poor 0.25 0 0.08 0.09
Bust -- -0.13 -0.2 -0.18
Enter answer in percents.