A-man-has-10000-to-invest-He-invests-4000-at-5-and-3500-at-4-In-order-to-have-a-yearly-income-of-500-he-must-invest-the-remainder-at-
A man has $10000 to invest. He invests$4000 at 5% and 3500 at 4%. In order to have a yearly income of $500, he must invest the remainder at —?