A company records the number of hours its employees work overtime each week. The data for four different departments are summarized in the frequency tables below. Which department has the greatest mean number of overtime hours per employee?
A) Department A: (Hours: 0, Freq: 10), (Hours: 5, Freq: 15), (Hours: 10, Freq: 20), (Hours: 15, Freq: 25)
B) Department B: (Hours: 0, Freq: 25), (Hours: 5, Freq: 20), (Hours: 10, Freq: 15), (Hours: 15, Freq: 10)
C) Department C: (Hours: 0, Freq: 15), (Hours: 5, Freq: 20), (Hours: 10, Freq: 20), (Hours: 15, Freq: 15)
D) Department D: (Hours: 0, Freq: 20), (Hours: 5, Freq: 10), (Hours: 10, Freq: 10), (Hours: 15, Freq: 20)
Department A
Department B
Department C
Department D
