CREATE TABLE table_72412 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

How many incumbents had a district of Arkansas 3?
SELECT COUNT("Incumbent") FROM table_72412 WHERE "District" = 'Arkansas 3'
SELECT COUNT("Incumbent") FROM "table_72412" WHERE "District" = 'Arkansas 3'