原帖由 prozzy 於 2007-5-18 23:05 發表。 公仔箱論壇" L8 I+ s8 l3 q+ a. J* l
the answer is -$97 for sure. - P! y6 H# Z. S9 n' L( x/ `) [& a+ V
Think about it this way TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。8 H9 ~7 |8 S$ M) a
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)6 O0 u5 R- A; s* o
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 3 \; ~% p9 X$ U! O5 I* wTVBNOW 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。" V6 j( e: E6 H* V9 M
% l; o2 I/ j. O2 w9 n' z% k4 j( b5.39.217.761) 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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- ], R! H& w. ?+ j" S* G公仔箱論壇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.
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: {8 _0 Q9 T3 e; x1 k3 f/ bI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |