原帖由 prozzy 於 2007-5-18 23:05 發表。 
8 C! h d. D M$ R) O) ]tvb now,tvbnow,bttvbthe answer is -$97 for sure. 5.39.217.76: c# F1 b, y/ e7 S. C
Think about it this way
2 y7 o9 z& ?2 G% w1 e公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)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。# `( P! d1 @" ?5 w S; D( f
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 3 C* s' w( P& A# `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。& Y0 J* Q% i: o2 ~4 n' g
/ x& _) r. s7 [& z/ @1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongtvb now,tvbnow,bttvb7 s& a7 V: `8 D0 y/ ^
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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.tvb now,tvbnow,bttvb0 s9 b, e' P2 H) ^6 t
公仔箱論壇( r# ~( ]2 e A% u1 o- d6 }
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |