
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 school plans to select 50 volunteers from a total of 2018 students across grades 10, 11, and 12. If the selection is made by first eliminating 18 people through simple random sampling from the 2018 individuals, leaving 2000 people, and then selecting through stratified sampling from these 2000, the probability of any one person being selected is __________.

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