CREATE TABLE table_12242 ("County" CLOB, "Per capita income" CLOB, "Median household income" CLOB, "Median family income" CLOB, "Population" FLOAT, "Number of households" FLOAT)

How many households have a Median household income of $43,889?
SELECT AVG("Number of households") FROM table_12242 WHERE "Median household income" = '$43,889'
SELECT AVG("Number of households") FROM "table_12242" WHERE "Median household income" = '$43,889'