choose the answer that is closest to the correct answer. if a protfolio consitst of $20\%$ of its value invested in a stock that has a beta of $2$ and $80\%$ in a stock that has a beta of $\mathrm{.}50,$ what is the beta of the portfolio?

$\mathrm{.}4$

$\mathrm{.}80$

$1\mathrm{.}00$

$2\mathrm{.}50$