CREATE TABLE table_21302_1 (no_of_villages VARCHAR2, density_persons___ha VARCHAR2)

How many villages have a density persons/ha of 5.5?
SELECT COUNT(no_of_villages) FROM table_21302_1 WHERE density_persons___ha = "5.5"
SELECT COUNT("no_of_villages") FROM "table_21302_1" WHERE "5.5" = "density_persons___ha"