一個人花8塊錢買了一隻雞,9塊錢賣掉了,然後他覺得不划算,花10塊錢又買回來了,
11塊錢賣給另外一個人了。問他最後的收益是多少?即你覺得他賺了多少錢?
我有想過去經濟版economics 問
不過我覺得好像比較偏邏輯性的題目
雖然我也不常來這個版
不適合的話,晚點我自刪
他最後的收益是2
『我覺得』他賺了2 塊錢,他自己覺得賺多少,我不知道
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