I need the answer as soon as possible

Q.11. q135 You hold one stock A with a standard deviation of 20%. You are thinking about buying another stock B with a standard deviation of 30%. You will hold these two stocks in a portfolio, with 50% of your money invested in each. Stock B has a correlation coefficient of -0.2 with stock A. Your friend says that adding a stock with higher standard deviation B than stock A will result in a riskier portfolio than just holding A alone. Is he right? That is, will your portfolio of A & B be riskier than just stock A? CS Scanned with CamScanner