CREATE TABLE table_10413 ("Class" TEXT, "Type" TEXT, "Quantity" FLOAT, "Date" TEXT, "LNER Class" TEXT, "1946 LNER nos." TEXT)

Which type has a quantity of 11?
SELECT "Type" FROM table_10413 WHERE "Quantity" = '11'
SELECT "Type" FROM "table_10413" WHERE "Quantity" = '11'