CREATE TABLE table_name_84 (genes INT, reference VARCHAR, strain VARCHAR)

what is the average genes when the reference is 2009 and the strain is rku-1?
SELECT AVG(genes) FROM table_name_84 WHERE reference = "2009" AND strain = "rku-1"
SELECT AVG("genes") FROM "table_name_84" WHERE "2009" = "reference" AND "rku-1" = "strain"