原帖由 prozzy 於 2007-5-18 23:05 發表。 
0 W. t( l+ V. sthe answer is -$97 for sure.
Y1 K0 i8 `" K8 }/ A9 nThink about it this way
! e) _0 N9 j: e1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
& Q9 U% m! g4 r" n7 Q9 {% gwww2.tvboxnow.com2) Now, the owner discovered that the 100 bucks is fake. You can th ...
公仔箱論壇9 Z/ x- J( T4 z9 E/ g9 n% x
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
) e* Y0 D5 f' F- u* ^. Y j4 l公仔箱論壇 * m: s! ~2 Y2 a: j$ g3 c
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.公仔箱論壇$ E3 n0 g4 U) @! \3 W2 H5 {
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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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