Averages in CAT are rarely about simple calculation. They are about 'balance' and 'deviation'. This guide teaches you the 'Assumed Mean' method and the powerful 'Alligation' technique to solve weighted average problems in seconds.
Stop calculating sums. Learn to view the Average as a fulcrum or balance point, allowing you to solve problems by observing deviations.
Learn the fundamental strategy for solving replacement and removal problems: converting averages to sums to track changes efficiently.
Master the concept of Weighted Averages for scenarios where groups have different sizes. Essential for Data Interpretation sets.
Learn the 'Rule of Alligation', a visual shortcut for solving weighted average and mixture problems without complex equations.
Explore the powerful property for evenly spaced sets (AP): Mean = Median. This is a frequent shortcut in CAT Number System questions.
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