原帖由 prozzy 於 2007-5-18 23:05 發表。  & T0 w. [/ D! H7 z9 O0 t# n
the answer is -$97 for sure. 5.39.217.760 O2 s/ f/ N/ M
Think about it this way 5.39.217.76* M2 }# w" U) x- H5 T* d
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)$ |. f% f8 n% b. R
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% j9 @' k" ~& X2 ^0 O
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。7 i) P% K0 d6 f& m2 w* d
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# x8 s" H' s6 o
9 t8 P4 ]) p5 X3 i6 g# l0 Etvb now,tvbnow,bttvbI 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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