
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
A bag contains five identical balls with the numbers "1," "2," "3," "4," and "6" marked on each of them. If three balls are randomly selected from the bag, what is the probability that the numbers on the selected balls form an arithmetic sequence?

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