A cylinder container with the moveable piston initially hold 3.0 mole of a gas at 8.0 atm pressure and a volume of 5.0 litre. If piston is moved to create a volume 10.0 litre , while simultaneously with drawing 1.5 mole of gas. Calculate the final pressure.

Question

$(a)\;1 atm\qquad(b)\;2 atm\qquad(c)\;3 atm\qquad(d)\;4 atm$