Answer:
7.78%
Step-by-step explanation:
Calculation for the expected return on a portfolio
First step is to calculate the portfolio beta
Portfolio beta=30%*1.1+30%*0.7=1.15
Portfolio beta=0.33+0.21
Portfolio beta=0.54
Now let calculate the expected return using this formula
Expected return=rf+(Portfolio beta*mrp)
Let plug in the formula
Expected return=4%+(0.54*7%)
Expected return=7.78%
Therefore the expected return on a portfolio is 7.78%