RIYADH, 29 January — Pakistani Finance Minister Shaukat Aziz arrived here last night to attend the sixth meeting of the Saudi-Pak Joint Economic Commission set to begin here tomorrow. Officials at the Pakistani Embassy said the minister was accompanied by senior officials and a group of 18 leading businessmen from the Pakistan Federation of Chambers of Commerce and Industry. Minister of Commerce Osama Faqeeh will head an 18-member Saudi delegation to the meeting. (M.G.A.K.)