Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group.公仔箱論壇' ?& w- p6 X+ f) W6 {
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./ @; F) ~2 C) u) E, S+ g( m9 ?2 I