
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 unit, there are 36 employees divided into three groups: elderly, middle-aged, and youth, with a ratio of 3:2:1. By using stratified sampling, a sample of size 12 is drawn. What is the probability that at most one of the youth members labelled 'A' and 'B' is selected?

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