Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group.: y" T' P# ?. ~9 U, Y
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.公仔箱論壇( u: U6 V+ _' E