
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 mean of three numbers is $20$ more than the least of the numbers and $30$ less than the greatest. The median of the three numbers is $10$. What is their sum?
A) 20
B) 30
C) 50
D) 60
E) 70

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