原帖由 prozzy 於 2007-5-18 23:05 發表。 公仔箱論壇% \9 J' @ M) p
the answer is -$97 for sure.
+ Q: r$ ~* N$ i1 Z0 r: ITVBNOW 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
( D" K4 _& Z6 D6 L1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
1 t# Y! X5 }, @0 |8 JTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2) Now, the owner discovered that the 100 bucks is fake. You can th ... / A( N* J: M2 v( S9 s
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tvb now,tvbnow,bttvb! _* u0 @# j$ b! a: G% P
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong5 z5 r# d1 ], d, ~. f
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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.公仔箱論壇% @# U5 `; }: O! K) g9 }7 n) R/ m
% C# L% J1 n2 O4 L1 Q' Dtvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |