Let P be Pass percent in 1998 and X is total nbr of students , then P/100 * X =72 and P < 80% , without knowing P we cant for sure say whether X has increased or decreased as there are 2 unknown's .It may be possible or it might not be .But (E) is impossible option so ans is (E) pqhai Verbal Forum Moderator Joined: 15 Jun 2012 Posts: 1153 Location: United States Followers: 170 Kudos [?]: