Taggart Inc.$\text{'}$s stock has a $50\%$ chance of producing a $37\%$ retum, a $30\%$ chance of producing an $11\%,$ return and a $20\%$ chance of producing a $27\%$ return. What is the firm's expected rate of return? Do not round your intermediate calculations.

a$.16\mathrm{.}40\%$

b$.25\mathrm{.}00\%$

c$.20\mathrm{.}60\%$

d$.21\mathrm{.}00\%$

e$.21\mathrm{.}80\%$