Solve the system 
using the inverse method.
Definitions:
Applicants' Grades
The academic scores or marks obtained by individuals applying for admission to educational programs.
Chi-Squared Test
A statistical test used to determine if there is a significant difference between observed frequencies and expected frequencies in categorical data.
Population Variance
Population variance quantifies the dispersion of a population's values, measuring how each value differs from the mean of the population.
Chi-Squared Test
A statistical test used to determine the significant difference between observed frequencies in one or more categories and their expected frequencies.
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