Home>Double Matrix Method
Lesson by Mike McGarry
Magoosh Expert

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