3. The set of whole numbers from 1 to 20 Set E = {2, 4, 6, 7, 9, 10)
Set F = {3, 4, 5, 9, 10, 13, 15, 16, 19, 20)

No because if you do the higher number minus the lower number you will get a positive. if you do it the other way around you will get a negative number

Iagree that is the answer to the question