
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 math test, Teacher Zhang found that the scores (in points) of the 6 students in the first group were $85$, $78$, $90$, $72$, ●, $75$. One student's score was contaminated by ink, but it is known that the average score of the group is $80$ points. What is the median score of this group?

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