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世事无绝对

    有一道小学一年级的期末考试题请教大家：某甲花费28元买进一只鸡用来出售，某乙用31元把甲的鸡买走，但是乙是用100元来支付买鸡，甲不够零钱，就只好问丙把100元换成零钱。这样一来甲就做成了这生意，过没多久丙拿着那100元找甲说：那100元是假钞，他要换，甲只好很无奈拿出一张真100元给回丙。
      现在问：甲一共亏了多少钱？

OFans

11# stefani


仔细想想， 应该是97。
重复计算了100。。。。

OFans

亏了 100+69+28 = 197

到手一张假币。。

kissmylv

打醬油路過

腿毛菲菲

嗯，楼上的回答很清楚。

luanluan

-97=-28(Cash outflow)+31(cash inflow-Sales)-100(cash outflow due to fake $100 returned). $69 is irrelevant as $100 is fake from 乙 and finally returned by to 丙 by a real one.

Or -97=-28(COST of ch ...
myself2662 发表于 2010-2-26 10:52

感觉关键是那只鸡到底值多少钱?
如果真值28块, 那买鸡的28块不应该算在"亏"里头的吧。。毕竟得到了一只28块钱的鸡

myself2662

-97=-28(Cash outflow)+31(cash inflow-Sales)-100(cash outflow due to fake $100 returned). $69 is irrelevant as $100 is fake from 乙 and finally returned by to 丙 by a real one.

Or -97=-28(COST of chicken Cash outflow+31(cash inflow-Sales)-{[69 MONEY LEFT FROM the CHANGES (cash outflow)+31(Cash outflow)]-this portion is to makeup 100 to return to 丙 }

luanluan

感觉是亏了69块。。。

甲本来有N块
买了鸡后有N-28+鸡
卖了鸡后有N-28+31-100

最后就（N-28+31-100)-(N-28+鸡) = -69-鸡。。

萨米

97...............

linxun

28+69+100=197

腿毛菲菲

197。。。。。。。

…卋ルヘ

197元么？~

花天堂

我都打電話要我consultant解決=.=