What numbers have a mean of 30?

To have a mean of 30, a set of numbers must average to 30 when summed and divided by the total count of those numbers. For example, the numbers 28, 30, and 32 have a mean of 30, as their sum (90) divided by 3 equals 30. Any combination of numbers that achieves this same average will work, provided their total sum divided by the count equals 30.