原帖由 prozzy 於 2007-5-18 23:05 發表。 
* ?( q9 C3 G T公仔箱論壇the answer is -$97 for sure. 公仔箱論壇3 K# E1 e5 Q! V2 \0 K+ c
Think about it this way
G& s. V/ G+ g: W' K4 L公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)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。6 v7 H! U: S) m* G
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5 R0 ?& I0 w9 |& a5 Y- o
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0 A; d+ p" g2 d& U5 j" a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
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- I/ Y: [: ]" C. O1 d Mthink about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.tvb now,tvbnow,bttvb( [! c! L0 v, i6 }: h/ E; X, o
8 {( r* [$ O3 I' v& q( E* B9 LI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |