
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
In a certain city, there are three types of hospitals: Class A with 4000 patients, Class B with 2000 patients, and Class C with 3000 patients. To survey the service attitude of the three types of hospitals, a stratified sampling method is used to select 900 people for the survey. The number of people sampled from Class B hospitals is ______.

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