Answer:
Expected rate of return of portfolio is 9.1%
Explanation:
Portfolio β = (Nike beta x weightage of Nike) + (Microsoft beta x weightage of Microsoft)
Portfolio β = ( 0.69 x 70,000 / 100,000 ) + ( 1.26 x 30,000 / 100,000 )
Portfolio β = 0.861
We will calculate the expected rate of return by using the formula of CAPM for Expected rate of return
Expected Rate of return = Risk free rate + beta ( Market premium )
Expected Rate of return = 3.9% + 0.861 ( 9.9% - 3.9% )
Expected Rate of return = 3.9% + 5.166% = 9.066% = 9.1%