Find the mean of the data set below?
2\4, 18\5, 28\10, 5\20

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

The answer is c. 7 (i think) i’m almost sure though