How many losses for the team with less than 4 wins, more than 0 byes and 2510 against?
CREATE TABLE "2008_ladder" (
  "mininera_dfl" text,
  "wins" real,
  "byes" real,
  "losses" real,
  "draws" real,
  "against" real
);
SELECT AVG("losses") FROM "2008_ladder" WHERE "wins"<4 AND "against"=2510 AND "byes">0;