
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 arithmetic mean of 60 numbers is 50. If four numbers 40, 50, 55, and 65 are removed from this set, what is the new arithmetic mean of the remaining numbers?
A) 48.5
B) 49
C) 50
D) 51

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