原帖由 prozzy 於 2007-5-18 23:05 發表。 
2 b% k" Y* E6 h. t6 |the answer is -$97 for sure. 公仔箱論壇7 u/ @ t! e5 J: f7 Y8 K% f5 r" J
Think about it this way
3 d. G$ I" M) N. U, L8 [# j1 v- Q1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
/ N; }# ` R! ~: {6 l# x公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ... TVBNOW 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。0 T0 E' A! }( x6 J- R r* C5 J
公仔箱論壇: H& h5 h% R" G7 I
) D+ U1 P' g6 j0 S; o# V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
; ^7 b: n+ H2 Dtvb now,tvbnow,bttvb
0 L% \# T0 e2 a! G8 L* Dwww2.tvboxnow.comthink 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.www2.tvboxnow.com9 n% H5 i3 R3 N
www2.tvboxnow.com8 p1 _6 t& m3 W2 |
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |