A solution contains A and B$,$ both of which are volatile. The mole fraction of A

is $0\mathrm{.}35.$ At $32$C the vapor pressure of pure A is $87$ mmHg and the vapor

pressure of pure B is $122$ mmHg$.$ What is the total vapor pressure of the

solution at this temperature? $($Assuming ideal behavior$)$

A$)110$ mmHg

B$)209$ mmHg

C$)80$ mmHg

D$)73\mathrm{.}2$ mmHg