
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
Determine the value of n for the number of students to be selected in a research study group for a stratified sampling, where 16 students are to be allocated to classes 1 to 8, and there are 480 students in these classes, 510 students in classes 9 to 17, and 240 students in classes 18 to 21.

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