Charles knows that the beta of his portfolio is equal to 1, but he does not know the risk-free rate of return or the market risk premium. He also knows that the expected return on the market is 10.00 percent. What is the expected return on Charles's portfolio? (Round answer to 2 decimal places, e.g. 12.25) Expected return % e Textbook and Media Save for Later Attempts: 0 of 3 used Submit