Stock X Has a Standard Deviation of 21 Percent Per

Multiple Choice

Stock X has a standard deviation of 21 percent per year and stock Y has a standard deviation of 6 percent per year.The correlation between stock A and stock B is 0.38.You have a portfolio of these two stocks wherein stock X has a portfolio weight of 42 percent.What is your portfolio standard deviation?

A) 8.89 percent
B) 9.85 percent
C) 10.64 percent
D) 11.84 percent
E) 12.92 percent