What is the population where the rank is higher than 51 and the Median House-hold income is $25,250?
CREATE TABLE "new_mexico_places_ranked_by_per_capita_i" (
  "rank" real,
  "place" text,
  "county" text,
  "per_capita_income" text,
  "median_house_hold_income" text,
  "median_family_income" text,
  "population" real,
  "number_of_households" real
);
SELECT SUM("population") FROM "new_mexico_places_ranked_by_per_capita_i" WHERE "rank">51 AND "median_house_hold_income"='$25,250';