Summary

The Double Matrix Method is a powerful tool for solving complex set problems in the GMAT, where each member of a population is classified by two variables simultaneously.

- The method involves creating a matrix to organize and cross-reference data across two variables, such as gender and education level.
- It simplifies the process of deducing missing information by providing a structured framework to visualize and calculate relationships between different data sets.
- The columns and rows of the matrix represent the different categories of each variable, with additional rows and columns for totals.
- Raw data and totals are systematically filled into the matrix, allowing for the calculation of missing values and the solution to the problem.
- This approach is versatile and can be applied to a variety of question types, including those involving numerical data, ratios, or algebraic expressions.

Chapters

00:00

Introduction to the Double Matrix Method

01:59

Organizing Information with the Double Matrix

04:19

Applying the Double Matrix to Solve Problems

06:13

Advanced Application of the Double Matrix Method

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