原帖由 prozzy 於 2007-5-18 23:05 發表。  公仔箱論壇( F% a! [, h- E: m- |3 u3 P
the answer is -$97 for sure. % p$ D* r/ S0 F
Think about it this way
7 U7 n) w. p8 i2 ^& i公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
8 b6 U7 }. L+ H) k4 d' o, t2) Now, the owner discovered that the 100 bucks is fake. You can th ...
+ O6 G( P. M- F1 e) l7 lTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。 ; N9 r- ?$ f7 `. w$ j. |* O9 B
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
$ T% {" n& ~$ X: t; B公仔箱論壇 5.39.217.762 F2 |. m$ K' z* Y; I
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.
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% N7 n- K8 g* C/ ^# ~4 E8 |5 ?# C5.39.217.76I 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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