$28-$ Courtney has a portfolio comprised of $48$ percent stock A$,21$ percent stock B$,$ and $31$ percent stock $C.$ What is her expected rate of return if the economy is in recession?

$\backslash$table$[[$State of Economy,$\backslash$table$[[$Probability of$],[$State of Economy$]],\backslash$table$[[$Rate of Return$],[$Stock A$]],\backslash$table$[[$Rate of Return$],[$Stock B$]],\backslash$table$[[$Rate of Return$],[$Stock C$]]],[$Boom$,0\mathrm{.}15,18\%,14\%,10\%$