原帖由 prozzy 於 2007-5-18 23:05 發表。 
$ h {0 K/ C* o# V5 L5.39.217.76the answer is -$97 for sure. 5.39.217.766 f7 d! Y6 v' S& [% M0 B
Think about it this way
9 @2 A! r: Z2 |5 w, W公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
# [$ S. z1 n# d$ R* Z( U6 N3 P5.39.217.762) Now, the owner discovered that the 100 bucks is fake. You can th ...
1 ^- j# A2 b- H" t- o& t5 R4 }6 l5.39.217.76 公仔箱論壇! g- m V1 F) ^7 t
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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' M# t! C e9 s6 d7 m公仔箱論壇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.5.39.217.768 a. R% @. q/ f& J! ~0 b
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I 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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