A dummies guide to betting on the Kentucky Derby

FILE - In this May 2, 2015, file photo, a man places a bet before the 141st running of the Kentucky Derby horse race at Churchill Downs, in Louisville, Ky. Picking a horse to win the Kentucky Derby is easy. Hoping that choice wins and pays off with a profit is the challenge.(AP Photo/Jeff Roberson, File)

LOUISVILLE, Ky. — Picking a horse to win the Kentucky Derby is easy.