
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
An element is selected at random from among the first $20$ rows of Pascal’s Triangle. What is the probability that the element chosen is an edge number in the triangle (either the first or last number in its row)?

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