What year had the Chassis of march 762 and more than 0 points?
CREATE TABLE "complete_european_formula_two_championsh" (
  "year" real,
  "entrant" text,
  "chassis" text,
  "engine" text,
  "points" real
);
SELECT COUNT("year") FROM "complete_european_formula_two_championsh" WHERE "chassis"='march 762' AND "points">0;