原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb M6 i$ O, c$ i) ?& j3 w K
the answer is -$97 for sure. 公仔箱論壇/ b! a3 ?( A% Y( D$ L
Think about it this way tvb now,tvbnow,bttvb9 v t: b/ B7 D4 I1 Z
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.76) g+ E i4 ^, g) Z
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 6 k' A0 g- T" k" Etvb now,tvbnow,bttvb3 a0 H- `5 S4 n, u) T7 m
" p4 u# A+ a8 }+ D; m* x5.39.217.761) 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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+ a4 @5 O g% Vthink 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.
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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. |