The range in this set of values (the difference between the highest and lowest value) is 78 - 9 = 69.
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6/12
No, 78 is not evenly divisible by 9.
Expressed as a proper fraction in its simplest form, 11/12 - 9/20 = 7/15
6 with remainder 12.
The median is 8.5. The mode is 8. The range is 14.