原帖由 prozzy 於 2007-5-18 23:05 發表。 
d( _+ l" h9 t; Gtvb now,tvbnow,bttvbthe answer is -$97 for sure. 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。1 |+ Z% n2 d5 W3 _
Think about it this way
: r1 |% T m/ x9 s9 g/ U# vtvb now,tvbnow,bttvb1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)公仔箱論壇: N7 U* F! \7 S% i
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 0 t, U w/ D3 h- D+ ], ^
tvb now,tvbnow,bttvb5 ]) H. N# L3 b2 f- m
( ^- W7 [8 \; i2 y! ]$ V5 l& X: T5.39.217.761) 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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' P# N2 y8 z {' pthink about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.公仔箱論壇( R) N9 x9 b; J* N- A' X' v
2 i1 H$ l: F7 L" f0 E# w, S' S2 A2 q6 C5.39.217.76I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |