原帖由 prozzy 於 2007-5-18 23:05 發表。  TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。8 g- m! P+ V+ _: Y3 u, f2 X
the answer is -$97 for sure.
- v" Z) l* X5 i* K$ ntvb now,tvbnow,bttvbThink about it this way
; s; m9 e" H9 C# O' J0 j公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
! t+ `0 U% L) Z4 F2) Now, the owner discovered that the 100 bucks is fake. You can th ...
公仔箱論壇3 ]2 L5 o0 s5 {7 C
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
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think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
+ q O) t9 U. S+ Ztvb now,tvbnow,bttvb / d2 z- Y! U0 F; U, X4 V \# y4 V
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |
發表於 2007-7-10 05:18 PM
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發表於 2007-7-11 03:19 PM
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