Answer: 4 times.

來源: 於 2010-04-27 13:19:11 [舊帖] [給我悄悄話] 本文已被閱讀：次

But, in my analysis/calculation, by 4 times weighting, we can find an abnormal ping-pang ball from total 38 ping-pang balls.

Can you try to solve my new question?