Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group. 6 U& E& B" t% }% V+ K- _6 K公仔箱論壇The problem is we don't know the weight of each individual ball, so it will not be accurate to figure out which ball is irregular by only weight them once. 3 h, z: R* _ e# }7 ]& wtvb now,tvbnow,bttvb