jacky101mm

Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group.% a8 A4 c0 n* {" {" O
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.& ?1 i/ i, s$ D9 }7 P: c3 F