原帖由 prozzy 於 2007-5-18 23:05 發表。  tvb now,tvbnow,bttvb# [* F, L0 O( q7 E% ]) |
the answer is -$97 for sure.
$ _4 }( d c/ n! t公仔箱論壇Think about it this way
2 a4 F* q- o3 n公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)公仔箱論壇5 ^- C8 e6 B& |
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公仔箱論壇, C; C3 g" d) C6 m4 I
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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.' ^, }4 O: Y5 Y9 X/ F/ s3 d
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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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