
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
A school has 120 students and 6 teachers. Each student is enrolled in one class during the first period, and each teacher teaches one class. The enrollments for the five classes are 60, 30, 20, 5, and 5. Calculate $t - s$ where $t$ is the average number of students in a randomly selected teacher's class, and $s$ is the average number of students in the class of a randomly selected student, including the student themself.
A) -20.25
B) -10
C) 0
D) 10
E) 20.25

Present the answer in LaTex format: \boxed{Your answer}
user