The following table shows the annual expected returns for two stocks.

If a portfolio is made up of $50\%$ of Stock A and $50\%$ of Stock B$,$ is the portfolio's standard deviation

assuming that the correlation between the two stocks is $0\mathrm{.}50.$The following table shows the annual expected returns for two stocks.

If a portfolio is made up of $50\%$ of Stock A and $50\%$ of Stock B$,$ is the portfolio$$s standard deviation assuming that the correlation between the two stocks is $0\mathrm{.}50.$