原帖由 prozzy 於 2007-5-18 23:05 發表。 
5 ^5 a1 X& o ?; v* |* a8 o公仔箱論壇the answer is -$97 for sure.
; G9 H+ X: v5 d, q7 @Think about it this way
8 V4 ~7 @4 v' U7 ?/ O' W* A5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.765 ` P# h7 K4 o8 w4 [/ X
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
' x$ V2 I& i( W, i1 ]" q/ [tvb now,tvbnow,bttvb1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
# H7 P; ~6 X0 k, @5 ~5.39.217.76 , p' J: Z3 \: ~( }
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.
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7 h' T1 ]# C t5 ~: Y6 C公仔箱論壇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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