原帖由 prozzy 於 2007-5-18 23:05 發表。 
( B" Z1 @* j9 _ \* }the answer is -$97 for sure. 公仔箱論壇/ G& G1 ]1 ?% s. ^0 K
Think about it this way
2 ^$ {3 V0 X4 t6 v公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
9 p. U/ d2 m8 p2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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9 z: \/ k1 w9 v- h' S0 b' q6 C9 _1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongtvb now,tvbnow,bttvb* G9 p3 r( i% z
6 p7 J4 G9 }2 P) k3 ]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.1 n! z. V2 d, K
5 S7 x1 N& v4 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. |
發表於 2007-7-10 05:18 PM
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發表於 2007-7-11 03:19 PM
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