原帖由 prozzy 於 2007-5-18 23:05 發表。  5.39.217.765 b& f; o0 ~. Y
the answer is -$97 for sure. 9 j$ Y/ K4 B# T. b
Think about it this way 5.39.217.76$ Y+ B, P4 C9 T. }
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
0 O% ?, t1 h8 a2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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$ E- b. u- B$ Y$ l1) 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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think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill., w: w3 H, Z( Q! L
9 b* v. }1 e9 z; a$ S6 `) V }- |. oTVBNOW 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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