Answer:
15.3%
Step-by-step explanation:
The computation of the revised estimated of the expected rate of return on the stock is shown below:
For Before
Rate of return = Standard deviation + (IP × beta + IR × beta)
10% = Standard deviation + (2% × 1.2) + (4% × 0.7)
10% = Standard deviation + 2.4% + 2.8%
So, the standard deviation is 4.4%
Now after changes the expected rate of return is
After
Rate of return = Standard deviation + (Growth rate × beta + Inflation rate × beta)
= 4.4% + (5% × 1.2) + (7% × 0.7)
= 4.4% + 6% + 4.9%
= 15.3%