原帖由 prozzy 於 2007-5-18 23:05 發表。 
/ }( A! L; }$ {tvb now,tvbnow,bttvbthe answer is -$97 for sure. 公仔箱論壇3 X& V% q5 ~4 L$ H/ B4 ~
Think about it this way
7 H# ]! A! w5 n' U6 i+ Htvb now,tvbnow,bttvb1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18), u! M# d& s( p8 Q
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
( W6 ]- @% G7 y公仔箱論壇 & Y9 A5 F4 S" v: X: ]5 h$ I+ x7 a9 H
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongTVBNOW 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。5 `. c+ y! E) Q: B0 ^
TVBNOW 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。& M1 ]& k. `, m3 }
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
' P0 [; \4 ]$ G5 ETVBNOW 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。 tvb now,tvbnow,bttvb9 S8 b" W0 I3 Q3 k% G4 F) `* s
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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