CREATE TABLE table_13017 ("County" TEXT, "Per capita income" TEXT, "Median household income" TEXT, "Median family income" TEXT, "Population" FLOAT, "Number of households" FLOAT)

Which Population has a County of mississippi, and a Number of households smaller than 17,741?
SELECT SUM("Population") FROM table_13017 WHERE "County" = 'mississippi' AND "Number of households" < '17,741'
SELECT SUM("Population") FROM "table_13017" WHERE "County" = 'mississippi' AND "Number of households" < '17,741'