Is Dr. Charles's portfolio better or worse than the one invested entirely in Stock X or is it not possible to say?

Dr. Charles has invested 70% of his money in Stock X and the remainder in Stock Y. He collected the following data about these two stocks: Stock X Stock Y Expected Return 25% 15% Standard Deviation 15% 40% Correlation between returns of Stock X and Stock Y:0.8. What is the expected return of his portfolio? Edit View Insert Format Tools Table 12pt Paragraph ev Tvoorov