某人以每3个1.6元的价格购进一批拮 子。随后又以每4个2.1元的价格购进数量是前 一批2倍的桔子，若他想赚取全部投资20%的盈 利，则应以每3个多少元的标价出售？

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='31555' and id < 2527929 and id<>'2527929' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31555' and id > 2527929 and id<>'2527929' order by id asc limit 5