A portfolio is composed of two stocks, $x$ and $Y.$ The standard deviation of return for Stock $x$ is $25\%$ and for Stock $Y$ it is $20\%.$ Stock X comprises $60\%$ of the portfolio, whilst stock Y comprises $40\%$ of the portfolio. The correlation coefficient between the returns on Stock X and stock Y is $0\mathrm{.}3.$ Compute the standard deviation of return for the portfolio.