
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 high school's sophomore class has 1500 students. In order to understand the students' learning situation, a stratified sampling method based on first-choice subjects of physics and history was used to conduct a survey. A sample of 120 students was selected, with 80 students choosing physics. The number of students in the grade who chose history as their first choice is ______.

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