CREATE TABLE table_203_175 (id DECIMAL, "rank" TEXT, "nation" TEXT, "gold" DECIMAL, "silver" DECIMAL, "bronze" DECIMAL, "total" DECIMAL)

how many countries won at least 1 gold and 1 silver medal ?
SELECT COUNT("nation") FROM table_203_175 WHERE "gold" >= 1 AND "silver" >= 1
SELECT COUNT("nation") FROM "table_203_175" WHERE "gold" >= 1 AND "silver" >= 1