What is the population where the median household income is $87,832 and there are fewer than 64,886 households?
CREATE TABLE "tennessee_counties_ranked_by_per_capita_" (
  "county" text,
  "per_capita_income" text,
  "median_household_income" text,
  "median_family_income" text,
  "population" real,
  "number_of_households" real
);
SELECT AVG("population") FROM "tennessee_counties_ranked_by_per_capita_" WHERE "median_household_income"='$87,832' AND "number_of_households"<'64,886';