Median and Mean

The median of the list n; n+3, n+4; n+5; n+6; n+8; n+10; n+12; n+15 is 10. What is the mean?

What is the median and what is the mean?

There are 9 numbers, and the median is the 5th number n+6.
Compare each number with the median, the mean is
10+(-6-3-2-1+2+4+6+9)/9=11.

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