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甲、乙两人用同一不准确的天平(其臂不等长)零售白糖,他们都知道此天平不准。一日,甲售货,某顾客欲购白糖若干,例如说2公斤,甲将某半重(即1公斤)的砝码放于左盘(固定天平的一端为),置白糖于右盘使之平衡后给顾客;又将1公斤砝码换于右盘,另置白糖于左盘,平衡后再给顾客,最后,甲对顾客说:“你绝不吃亏”。另一日,乙售货,有顾客购糖,乙将白糖若干置于左盘,加砝码于右盘使之平衡;又将这些糖换置右端,加砝码于左盘使之平衡,然后,乙按两次所称重量的平均重量收费,并对顾客说:“你绝不吃亏”。甲和乙谁信得过?结论是甲诚实,乙欺骗顾
Both A and B used the same inaccurate scales (which had unequal lengths) to sell white sugar, and they all knew that the balance was not accurate. One day, A sales, a customer wants to buy some of the white sugar, for example, 2 kg, A will be a half weight (ie, 1 kg) weight placed on the left plate (the end of the fixed scale is), put the sugar in the right disk After the balance to the customer; another 1 kg weight for the right disk, another place sugar in the left disk, after the balance to the customer, and finally, A said to the customer: “You never lose out.” On the other day, B sells goods, some customers buy sugar, B places some sugar in the left plate, and adds weights to the right plate to balance it; Then, B charges the average weight of the two said weights and says to the customer, “You will never lose out.” A and B who believe it? The conclusion is that A is honest and B is deceived