About This Set
These 25 questions are at real Tier 1 level, and the wrong options are the ones SSC usually sets: the plain average of two group averages, the old count used in place of the new one, a ratio turned round. Combined and weighted averages get seven questions, since they come up often in the exam; the other types from the four topic sections are mixed in. Allow about 25 minutes and attempt all 25 before you check. With 20 or more right, move on to Practice Set 3.