原帖由 prozzy 於 2007-5-18 23:05 發表。  公仔箱論壇9 f$ m) B; W. w4 x
the answer is -$97 for sure.
/ E- v7 Y; m# |0 \Think about it this way tvb now,tvbnow,bttvb5 c- Q7 M- {; s6 P5 d6 M
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)( ?2 u/ N! x5 K+ w4 @, d
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong6 `1 I, o' G; K8 B, k$ F7 F% S
tvb now,tvbnow,bttvb9 [, ]/ N) Q0 k8 A/ o7 L
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; A8 S( A: ]2 B6 N, X
, N0 o4 T% I9 m! E( I' lI 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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