CREATE TABLE table_59507 ("School" TEXT, "Suburb/Town" TEXT, "Years" TEXT, "Founded" FLOAT, "Website" TEXT)

What is the average year founded that is located in Broken Hill and has school years of k-6?
SELECT AVG("Founded") FROM table_59507 WHERE "Years" = 'k-6' AND "Suburb/Town" = 'broken hill'
SELECT AVG("Founded") FROM "table_59507" WHERE "Suburb/Town" = 'broken hill' AND "Years" = 'k-6'