Ranked as the richest person in the world, this business magnate derived his fortune from extensive holdings through his conglomerate that was formed in what year?
Carlos Slim:  He derived his fortune from his extensive holdings in a considerable number of Mexican companies through his conglomerate, Grupo Carso. Grupo Carso:  It was formed in 1990 after the merger of Corporación Industrial Carso and Grupo Inbursa.
i don't know