Red rep is only 1 point I believe. Green rep can be multiple points. So if you get a green rep worth 10 points, and a red rep, you still have 9 positive rep points. The amount of green rep depends on the number of posts and rep the person who is giving you the rep has.
thats wrong, if i gave you green you get 10 points, if i give you red, it takes 10 points off you and takes 1 point off me too. someone with 5 blobs, gives 5 and takes 5 off when giving red, and it takes 1 off them too
U r also wrong,if u (or members with full rep) give red rep to anyone then it will take only 5 points off (not 10) .