
Answer:
Sharpen Ratio  =         Rp  - Rf
             standard deviation of portfolio
            =   13.8%  - 3.6%
                   173.11%
               =  0.05892
               = 0.059
workings
Return of portfolio  =  Ra*wa  +  Rb*Wb
              =  15%*0.6  +  12%*0.4 Â
              =  9%  +  4.8%  =  13.8%
Standard deviation of portfolio = Â square root of variance
= √ stdA²wa² + stadB²wb² + 2wawbcorrAB
= √(24%*0.6)² +(14%*0.4)²  + 2*0.6*0.4*1.27
=  √207.36% + 31.36% + 0.6096
=  √2.9968
= 1.73
= Â 173.11%
                        Â
Explanation: