CREATE TABLE table_203_661 (id DECIMAL, "year" DECIMAL, "single" TEXT, "peak chart positions\ us mod" DECIMAL, "peak chart positions\ uk" DECIMAL, "album" TEXT)

what was the average chart position of their singles in the uk ?
SELECT AVG("peak chart positions\nuk") FROM table_203_661
SELECT AVG("peak chart positions\nuk") FROM "table_203_661"