ABC Inc.$\text{'}$s stock has a $50\%$ chance of producing a $21\%$ return, a

$30\%$ chance of producing a $10\%$ return, and a $20\%$ chance of producing

a $-30\%$ return. What is the firm's expected rate of return? $1.9\mathrm{.}72\%$

$2.9\mathrm{.}88\%3.7\mathrm{.}82\%4.7\mathrm{.}50\%5.8\mathrm{.}37\%$