原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb& K# P' l3 l5 Z/ M) {7 A2 j
the answer is -$97 for sure.
+ O! t% u( X+ n% `公仔箱論壇Think about it this way tvb now,tvbnow,bttvb9 d( E3 A! s* g. ^% X" g1 i
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)公仔箱論壇3 u' z. }$ q6 n8 e4 ~" h
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5 ?$ G' F; f! y. ^' B. @5.39.217.76公仔箱論壇0 x( S l+ L+ h3 i
5.39.217.76% D0 J2 m; d# y) ]; K& ^
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong) k$ ?0 |: K0 k; d, D& i6 R
9 a4 n* ?$ n# W! w( zthink 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.
( T+ c b5 n) F* M8 Gtvb now,tvbnow,bttvb
+ M* s2 L4 V6 j* kI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |