原帖由 prozzy 於 2007-5-18 23:05 發表。  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。( ^5 J% B, F) q- J! R, v
the answer is -$97 for sure.
- j/ g( e8 X9 q+ eThink about it this way 5.39.217.77. t% t& l% X9 R' ^/ f( N: r
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.774 q' u" u# m; E5 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
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think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.5.39.217.77& Z! [$ D! I M2 [3 {
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。1 M. ]+ Y9 o$ v+ B* ?) N
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 2007-4-9 06:27 PM
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