no excel please

You decide to invest in a portfolio consisting of 35 percent Stock X and the remainder in Stock Y. Based on the following information, what is the standard deviation of your portfolio? THE STANDARD DEVIATION OF THE PORTFOLIO IS PERCENT (XXX) State of Economy Probability of Return Stock X for Return Stock Y Economic State given Economic for given State Economic State 75 10.90% 4.30% 25 18.20% 26.20% Normal Boom Numeric Response