Answer:
CCC's new required rate of return is 16.5%
Explanation:
in the first we need to determine the risk free rate using the Capital Asset Pricing Model formula of Miller and Modgiliani as shown below
required return=Rf+beta*(average market return-Rf)
Rf is the risk free rate that is unknown
Beta is 1.5
average market return is 10%
required rate of return is 12%
Rf?
12%=Rf+1.5*(10%-Rf)
12%=Rf+15%-1.5Rf
1.5Rf-Rf=15%-12%
0.5Rf=3%
Rf=3%/0.5
Rf=6%
Average rate of 10% has now increased by 30% i.e 10%*(1+30%)=13%
Required rate of return=6%+1.5*(13%-6%)
=6%+1.5*7%
=6%+10.5%=16.5%