CREATE TABLE table_49366 ("Rider" CLOB, "Manufacturer" CLOB, "Laps" FLOAT, "Time" CLOB, "Grid" FLOAT)

What is the average Laps, when Grid is 15?
SELECT AVG("Laps") FROM table_49366 WHERE "Grid" = '15'
SELECT AVG("Laps") FROM "table_49366" WHERE "Grid" = '15'