
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
In a seminar consisting of doctors and lawyers, the average (arithmetic mean) age of all attendees is 45. If the average age of the doctors is 40 and the average age of the lawyers is 55, and the total number of attendees is 20, find the ratio of the number of doctors to the number of lawyers.
A) 1:1
B) 3:2
C) 2:3
D) 2:1
E) 1:3

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