← Reading Room
A complete SSC/RRB-ready study book on Average: core theory, weighted average, average speed, the deviation (assumed-mean) method, shortcuts, worked examples, and a full 20+30 MCQ practice set with solutions.
Chapters
11. Introduction22.1 Basic Average Formula32.2 Average of Consecutive Numbers42.3 Average of Squares and Cubes of First n Natural Numbers52.4 Weighted Average62.5 Average Speed72.6 Effect on Average When a Member is Replaced82.7 Effect on Average When a Member Joins or Leaves92.8 Combined Average of Two or More Groups102.9 Average Age Problems (Present / Past / Future Shifts)112.10 Deviation Method (Assumed Mean Method) for Fast Calculation122.11 The Zero-Sum Property of Deviations from the Actual Mean