CREATE TABLE table_name_11 (quantity_preserved VARCHAR, fleet_number_s_ VARCHAR)

What is the quantity preserved for fleet number(s) 3000 3015?
SELECT quantity_preserved FROM table_name_11 WHERE fleet_number_s_ = "3000–3015"
SELECT "quantity_preserved" FROM "table_name_11" WHERE "3000–3015" = "fleet_number_s_"