原帖由 prozzy 於 2007-5-18 23:05 發表。 
: \1 n# w. i* F5.39.217.76the answer is -$97 for sure.
. N% o& W7 k; Q3 l: Q; NTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。Think about it this way
9 R$ b" I2 H+ o. A# s9 e1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)' z. r: l7 {& j$ m& G$ |; L; F+ }
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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: a) L4 Q, s1 C C, b/ Ltvb now,tvbnow,bttvb1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong$ s# E6 p( B, [" c
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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.
) q/ [0 d' |( Q/ N9 ~, Z( _% _ A5.39.217.76
! k9 M/ q0 _4 S: [; NTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。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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