Two different classes, Class X and Class Y, took the same quiz. The scores for each class are summarized in the frequency tables below.

Class X Scores:
(Score: 60, Freq: 10), (Score: 70, Freq: 15), (Score: 80, Freq: 20), (Score: 90, Freq: 15), (Score: 100, Freq: 10)

Class Y Scores:
(Score: 60, Freq: 15), (Score: 70, Freq: 10), (Score: 80, Freq: 10), (Score: 90, Freq: 15), (Score: 100, Freq: 20)

Which of the following statements is true regarding the mean scores of Class X (Mean${}_X$) and Class Y (Mean${}_Y$)?