
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
To investigate the performance of senior students in mathematics mock examinations at three schools, designated as A, B, and C, in a certain region, a stratified sampling method was adopted. Samples were drawn from 1260 exam papers from school A, 720 papers from school B, and 900 papers from school C. If 50 papers were sampled from the 900 papers of school C, the total number of exam papers sampled in this survey is __________.

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