
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
The number of third-year students in a stratified sample of 200 students, selected from 1300 first-year students, 1200 second-year students, and 1500 third-year students, can be determined using the following formula: 

Let x be the number of third-year students in the sample. Calculate the ratio of the total number of third-year students to the total number of students in the sample, and then solve for x.

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