‘n Onderdele winkel verkoop nuwe en gebruikte onderdele. Sestig persent van die onderdele is gebruikte onderdele. Vyf-en-sestig persent is gebruik of defektief. Indien vyf persent van die winkel se onderdele defektief is, watter persentasie is beide gebruik en defektief. / A part store sells both new and used parts. Sixty percent of the parts in stock are used. Sixty five percent are used or defective. If five percent of the store’s parts are defective, what percentage is both used and defective?