before 1995 waht is the aveage pts for a mclaren mp4/10b chassis
CREATE TABLE "complete_formula_one_results" (
  "year" real,
  "entrant" text,
  "chassis" text,
  "engine" text,
  "pts" real
);
SELECT AVG("pts") FROM "complete_formula_one_results" WHERE "chassis"='mclaren mp4/10b' AND "year"<1995;