原帖由 prozzy 於 2007-5-18 23:05 發表。 
7 r+ T' U6 X- E: Xthe answer is -$97 for sure. % v- h6 P9 L: r+ H. E, U2 w" I
Think about it this way $ _* R8 @* t5 |0 z" u5 W6 N0 y. L
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)www3.tvboxnow.com7 c6 Y8 z, P& x- F9 @3 ^
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
8 Y x) L: l9 C0 O. g: O公仔箱論壇 www3.tvboxnow.com: Q3 L `8 D- g0 h; f, h
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& d4 p' b9 P6 b- i
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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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