原帖由 prozzy 於 2007-5-18 23:05 發表。 
& r8 |9 z% s& o( ^/ J/ zthe answer is -$97 for sure.
$ V0 d6 B, F) r2 m( H* `5.39.217.77:8898Think about it this way
7 l9 w& t# w; l4 H, a# R公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)tvb now,tvbnow,bttvb5 }) Y, N8 A) |
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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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
7 ~7 i5 R, |) e# d! W* n) m公仔箱論壇
9 X6 b1 n j- W! m; etvb now,tvbnow,bttvbthink about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.5.39.217.77:8898: ?) j- @; ?5 G s* o$ O# g- o
公仔箱論壇. |3 \6 o/ t( B2 [6 I
I 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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