原帖由 prozzy 於 2007-5-18 23:05 發表。 公仔箱論壇! v$ M) o6 v4 ^8 f" h- z& @9 d. H
the answer is -$97 for sure. $ y; F- ?2 b3 ~2 c7 B/ |; e
Think about it this way
/ u q: R( W" Y: U7 [" h3 ftvb now,tvbnow,bttvb1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.77:8898# t$ y4 W: o0 e8 T3 J
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 公仔箱論壇8 b9 v# ?6 Y% G0 K/ A9 B$ r! S8 Q
tvb now,tvbnow,bttvb* X- Z- R7 p1 i+ A/ H
! X, b' G$ `0 S; {) q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
( i* f n; m$ V4 I8 {9 M 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。& k. w7 q& M' H0 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.
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& b2 O# o& j& ~0 v- h, G, @公仔箱論壇I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |