原帖由 prozzy 於 2007-5-18 23:05 發表。  tvb now,tvbnow,bttvb2 K, }9 l3 @% C0 r
the answer is -$97 for sure.
, H0 o# Q- n+ e E" G. `% PThink about it this way
7 f' G& j+ E8 \8 g+ \, u' s# P6 N1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18) V2 e/ q: G' v
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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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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think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.公仔箱論壇1 \+ @) g9 T# z( [# `$ J& H
公仔箱論壇3 o" s( Y' M5 ~; x. u
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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