Four possible answers were given: 18, 12, 6, 2.

Also, what is meant by the 9 variation scores adding up to +12 is for example.

22 - 20 = 2

18 - 20 = -2

17 - 20 = -3

23 - 20 = 3

etc., and the total of X-M for the 9 raw scores was +12

Is this question even possible to figure out? Wouldn't you need at least the Sum of Squares for the 9 raw scores?