原帖由 prozzy 於 2007-5-18 23:05 發表。 
6 ^" g" A; u7 B1 z* R8 P X5.39.217.76the answer is -$97 for sure.
( P+ X: W# J; B/ w8 j2 Etvb now,tvbnow,bttvbThink about it this way
1 I e" V4 C7 e* j公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5 A# N; y5 A2 C, c* F$ U/ {7 W
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 9 f( E& T: O- ?+ t- q( T: _
; t5 {8 Q* J/ FTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。
/ H) b( T4 i) Y7 t8 ] S$ n5.39.217.761) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong& I, }$ A' A R& z; |
0 z: c# F7 g+ f/ \. k3 b( M
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.$ X. K; x0 U7 E7 A' l* W
9 K x5 v2 M* W+ X5.39.217.76I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |