A 300 L Liquefied Petroleum Gas Cylinder Consists of 55

A 30.0 L liquefied petroleum gas cylinder consists of 55.0% propane by mass and 45.0% of butane. If the total volume of the liquefied gases is 23.0 kg, then what is the total pressure exerted of the gaseous mixture in the cylinder at 25.0˚C? Given: Molar mass of propane is 44.096 g/mol

A) 82.5 atm
B) 0.825 atm
C) 11.5 atm
D) 0.425 atm
E) 42.5 atm