原帖由 prozzy 於 2007-5-18 23:05 發表。 
2 s2 J' x; o) d/ |7 W5 ptvb now,tvbnow,bttvbthe answer is -$97 for sure. tvb now,tvbnow,bttvb: A" T8 a- P6 z
Think about it this way & G$ j% \& t, p7 X; ]7 L8 ]
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)4 J7 n0 h3 h! e, B+ o3 s
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 9 {3 }6 X. y! h( E7 G2 l4 T
: E0 {2 m1 W# ~; E0 `; \: VTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。 : e) h2 v" d1 V& f$ H
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
- v/ ^$ P- q- g& e4 y公仔箱論壇
9 t& ~5 ~; G# u" W/ cTVBNOW 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。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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I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |