
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 certain high school has three grades. The freshman class has 400 students. Using stratified sampling, a sample of 45 students is selected, with 15 students from the sophomore class and 10 students from the senior class. What is the total number of students in the high school?

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