原帖由 prozzy 於 2007-5-18 23:05 發表。 
1 H4 T9 W: m6 r7 Otvb now,tvbnow,bttvbthe answer is -$97 for sure.
1 o' v9 }) m ^2 Q5 t$ k1 wThink about it this way
% b& m, y) E* k; l3 x$ b8 b% k1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)+ f! _: D5 \, D! K' n& A) t
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
4 J0 h, [# ~# e6 M' |% t公仔箱論壇
) B8 I1 r( v c0 Z3 f公仔箱論壇1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong公仔箱論壇! O" x9 \6 B3 F6 e0 Q5 U X, c
5.39.217.768 ?* ~* ~5 m$ v+ [& ^6 `! h
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.
; H0 w; r" d# }( [7 R {+ K- w& ptvb now,tvbnow,bttvb
- r. X d& d% R* [1 R) ^7 N3 ytvb now,tvbnow,bttvbI 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
| 
發表於 2007-7-11 03:19 PM
| 
