
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 600 students in the first grade, 500 in the second grade, and 400 in the third grade. If a stratified sampling method is used to extract n students from the school, and there are 30 students from the first grade in the sample, then determine the total number of students in the sample.

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