xcise_science Master | Next Rank: 500 Posts View User Profile Posts: 106 Joined: Tue Oct 09, 2007 12:25 pm Thanked: 1 times gmat prep questions by xcise_science » Sat Nov 24, 2007 11:44 am For Q1, Is this the right way to solve this problem? 90th percentile out of 80, that can be 72 81st percentile out of 100, = 81 =>72+81=153 -->153 is 75% of 180. Answer is D Is this calculation right? Top Quote