原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb- t$ g; G. Y* i* A: A7 |
the answer is -$97 for sure.
: U9 m: o+ ]: e6 j* c公仔箱論壇Think about it this way & m7 O! R6 @& ~: G
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。( N# x- b$ R. M7 [. T: H* Z' `: a
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 4 c i( S1 [" ^5 B# I
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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 $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
5 v$ c! u; e* ~2 T) p8 @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。
* m/ i- |- v0 _2 Ntvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |