Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group.5.39.217.76; ]0 g$ X8 ^2 ^1 e% u, U+ p
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.* B; m! X) @/ d3 B9 _+ m9 h