Group Performance Analysis in Academic Subjects

A university conducted a study to analyze the performance of students in various subjects over the past academic year. The data collected included the average grade percentages in Mathematics, Science, and Literature for three different groups of students: Group X, Group Y, and Group Z. The results of the study are summarized in the table below:

Based on this study, the university aims to determine which group had the best overall performance across the three subjects. They calculated the overall average percentage for each group.