
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
The 110th anniversary celebration of Guiyang No.1 High School was held on September 30, 2016. During the celebration, 2 volunteers from the 10th grade and 4 volunteers from the 11th grade were randomly selected to serve at Gate 1 to welcome the alumni. The probability that at least one of the selected volunteers is from the 10th grade is ______.

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