原帖由 prozzy 於 2007-5-18 23:05 發表。 
: S$ b2 E F9 X; [tvb now,tvbnow,bttvbthe answer is -$97 for sure. 公仔箱論壇/ D8 |$ G7 f4 Q
Think about it this way 5.39.217.76! {2 Q1 A8 y1 ~: g$ O& q) l3 x
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
: T( k9 J" T1 c$ w% |& N5 wtvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ... : @; f; T2 V' _6 L5.39.217.765.39.217.76 h; J' w5 q# S" d# h1 Y" h
. c7 v2 d4 c. E( ~! n) ]# J; W! h5 ctvb now,tvbnow,bttvb1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
# X5 a( w* S! E9 {; f5.39.217.76
- u3 R+ q& @; L l5 x7 {) w7 _公仔箱論壇think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.tvb now,tvbnow,bttvb/ `# J) x* B$ N& O& f# k+ t
) E- V1 Z8 F( l- x0 lI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |