Answer: 16%
Step-by-step explanation:
Expected return of a portfolio is the weighted average of the returns of the individual stocks given the proportion of the portfolio invested in them:
= (Return on stock A * Percentage invested in stock A) + ( Return on Stock B * Percentage invested in Stock B)
= (12% * 20%) + (17% * 80%)
= 2.4% + 13.6%
= 16%