NEET 2005 Chemistry question

The vapour pressure of two liquids P and Q are 80 and 60 torr, respectively. The total vapour pressure of solution obtained by mixing 3 moles of P and 2 moles of Q would be :

• (A)144 torr
• (B)288 torr
• (C)14 torr
• (D)72 torrCorrect