How many Touchdowns have Extra points larger than 0, and Points of 48?
CREATE TABLE "michigan_48_ohio_northern_0" (
  "player" text,
  "touchdowns" real,
  "extra_points" real,
  "field_goals" real,
  "points" real
);
SELECT COUNT("touchdowns") FROM "michigan_48_ohio_northern_0" WHERE "extra_points">0 AND "points"=48;