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double matrix method

mike mcgarry
lesson by mike mcgarry
magoosh expert
quiz
word problems
summary
the double matrix method is a powerful tool for solving complex set problems in the gmat, particularly when each member of a population is classified in two distinct ways.
  • 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 the relationships between different data sets.
  • the columns and rows of the matrix represent the categories of each variable, with additional rows and columns for totals, facilitating easy addition and cross-checking.
  • this approach is versatile and can handle various types of data, including numerical values, percentages, and ratios, across multiple categories.
  • practical examples demonstrate how the double matrix method can be applied to solve gmat problems efficiently, highlighting its utility in managing complex information.
chapters
00:00
introduction to the double matrix method
01:59
organizing information with the double matrix
04:29
applying the double matrix to solve problems
06:13
advanced application of the double matrix method