Answer:
Porfolio return is 18%
Explanation:
Portfolio return is the weighted average return which is calculated on the basis of proportion of investment of each stock.
As per given data
Growth     Strong     Moderate     Weak Â
A           37%       14.00%       −8%
B           31%       12.00%       −4%
C           33%       22.00%      −6%
Investment Ratio
A : C = 1 : 1
Economic Growth is moderate so the growth moderate growth rate is used for the portfolio return calculation
Portfolio return = ( Ratio of investment of Stock A x Moderate growth of Stock A ) + ( Ratio of investment of Stock C x Moderate growth of Stock C )
Portfolio return = ( 1/2 x 14% ) + ( 1/2 x 22% )
Portfolio return = 7% + 11%
Portfolio return = 18%