
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
There are 6 parts, among which 4 are first-class and 2 are second-class. If 2 parts are randomly selected from these 6 parts, the probability that at least 1 part is first-class is ______.

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