Answer:
8.83%
Step-by-step explanation:
The computation of the required return is shown below;
The market risk premium is
= 9.5% - 4.2% ÷ 1.05
= 5.048%
Now
beta of portifolio is
= 10 ÷ 15 × 1.05 + 5 ÷ 15 × 0.65
= 0.9167
And, finally
required return is
= 4.2% + 0.9167 × 5.048%
= 8.83%