原帖由 prozzy 於 2007-5-18 23:05 發表。  S# p; ~, D: g6 f3 ^ L b
the answer is -$97 for sure.
7 Q/ Z' H( r* k- y- w5 C8 c: M公仔箱論壇Think about it this way www2.tvboxnow.com1 B, `* [0 O; S, ^9 [; i
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
6 y9 E. E3 J0 ^& B* v, l- qtvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong! S: _" |: K. G1 n9 i0 v
公仔箱論壇& }$ P9 J% ]- Q6 g4 c
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.7 Y- W$ C, c- D! g7 n
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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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