CREATE TABLE table_8402 ("Year" FLOAT, "Quantity" FLOAT, "Manufacturer" TEXT, "Serial Number" TEXT, "TVR Numbers" TEXT, "GWR Numbers" TEXT)

What is the average Year that has a Quantity of 10, and a GWR Numbers of 409, 290, 315, 317 321, 324, 333?
SELECT AVG("Year") FROM table_8402 WHERE "Quantity" = '10' AND "GWR Numbers" = '409, 290, 315, 317–321, 324, 333'
SELECT AVG("Year") FROM "table_8402" WHERE "GWR Numbers" = '409, 290, 315, 317–321, 324, 333' AND "Quantity" = '10'