statistics (mean, median, mode): X=3 and the first score is 2 points above and the second score is 4 points above how many points below is the third?
It would help if you proofread your questions before you posted them.
Are you indicating that all the measures of central tendency = 3 or that there are 3 scores?
"Above" what?
The mean acts as a fulcrum (balance point), so if the two scores add to +6, the third must be -6.
Does that help?