原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb1 C2 C, {+ s2 X4 M- X% N
the answer is -$97 for sure. 5.39.217.76 q5 H! M. p9 q- C1 O! E/ f
Think about it this way 6 I6 {' b5 @) D$ G$ x9 E
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)公仔箱論壇0 |$ }9 W/ I8 G3 c; X( d4 L
2) Now, the owner discovered that the 100 bucks is fake. You can th ... $ v) x ^3 r; b) |3 W( z. l
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2 B4 B ^1 @5 K! v3 K, K; b公仔箱論壇1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
$ e6 }0 v$ f9 e" c) Z8 ^tvb now,tvbnow,bttvb
3 o5 u4 @" Q- b& [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。think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
6 d! h' [2 D3 E6 C9 HTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。
/ n6 F) y, {. E2 }6 a$ K2 mI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |