Well..divided into 6/6 first to define a heavier group is certainly right. Randomly select 3/3 will result another heavier group.. u; k" S4 |! o0 T
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- Z4 @9 X+ l5 S/ C# U) o0 T
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