原帖由 prozzy 於 2007-5-18 23:05 發表。 
4 }3 e5 S ^) w/ o公仔箱論壇the answer is -$97 for sure.
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1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
& j" W* p8 c4 r+ E8 t) o公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ... 3 z' [$ |+ y' m0 i$ n2 N! _5.39.217.76
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( A. t# y9 w- z- X6 fTVBNOW 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。1) 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 $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。$ N* \! h0 a* _, r+ a
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I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |