
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 set of 100 balls, there are 20 red balls. If 10 balls are to be sampled for analysis using stratified sampling, how many red balls should be included in the sample?

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