原帖由 prozzy 於 2007-5-18 23:05 發表。 
5 C+ `( d9 W6 H ATVBNOW 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。the answer is -$97 for sure. www2.tvboxnow.com. O. R& R' W. z9 R6 {6 {2 E
Think about it this way
7 u. H% z$ j" _# x! vwww2.tvboxnow.com1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)0 w$ \! T* f9 n# W t
2) Now, the owner discovered that the 100 bucks is fake. You can th ... % ?! w7 i$ i4 C9 C! W D& {
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8 w, @5 v! B% |+ i$ Y% {公仔箱論壇1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
' {9 K5 w- T& w, P5 w 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# P. Q5 R+ n, W! M$ t% z
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.5 ?0 I$ x. L4 a+ {. M2 e" |+ H3 q$ t
/ q* t6 m7 d; E8 f% V8 Vwww2.tvboxnow.comI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |