jacky101mm

Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group.
4 {" a, F" ]! {9 g+ _/ m9 r8 S5.39.217.77:8898The 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.* n' Q& H6 J/ c/ g" B3 R- J. ]