An investor owns a portfolio of two stocks x and y$,$ the expected return and standard deviation of returns of the two stocks are E$($Rx$)=5\%,$ E$($Ry$)=10\%,$ Sx $=10\%,$ Sy $=12\mathrm{.}5\%$ respectively. The covariance of the returns is COVxy $=\mathrm{.}009375.$ The investor invests Rs$1,500$ in stock x and Rs$1,000$ in stock y$.$ What is the expected return of the portfolio?

Select one:

a$.11\mathrm{.}25\%$

b$.7\mathrm{.}0\%$

c$.7\mathrm{.}5\%$

d$.11\mathrm{.}0\%$