原帖由 prozzy 於 2007-5-18 23:05 發表。  5.39.217.760 z, j6 B7 g3 {/ G. R# D) o
the answer is -$97 for sure.
; I% O* L5 {" J" \6 C公仔箱論壇Think about it this way
3 M# r- \. R3 {- J8 L+ U1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
3 }1 @4 O! ^3 f- L- y% ?6 K' C公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ...
! O+ j1 }& X; h7 F# P$ w J 公仔箱論壇7 @4 ~5 z# o3 J! A
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
/ }$ M3 [% r/ o- f7 F1 O2 b$ ptvb now,tvbnow,bttvb
" ^ K1 T. _, D8 }% C' D1 n5.39.217.76think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.. K$ P7 n! r7 f8 r/ ~
+ P* ^& M; M3 Z' b- q& s: i" Q公仔箱論壇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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