
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
To understand the situation of sports activities among workers in a certain city, it is planned to use stratified sampling to select 7 factories for investigation from districts A, B, and C. It is known that there are 18, 27, and 18 factories in districts A, B, and C, respectively.  
(Ⅰ) The number of factories to be sampled from districts A, B, and C;  
(Ⅱ) If 2 of the 7 sampled factories are randomly selected for a comparative investigation of the results, calculate the probability that at least one of the two factories comes from district A.

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