原帖由 prozzy 於 2007-5-18 23:05 發表。 
B1 b+ x# n1 RTVBNOW 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。the answer is -$97 for sure. 3 V9 j0 u3 z1 A
Think about it this way
. }+ ~7 j* J' n6 x I' c1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
0 l, P2 L ^ \% {% \- I' Ttvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ... 公仔箱論壇, b9 T( V: B+ Y1 [2 l% [
/ @& F0 T$ ]$ t; s" V 5.39.217.76+ w: _& j4 \4 Q9 |0 U9 Q$ M8 |' L6 d
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
4 I1 |( o0 G+ \, W% Y 5.39.217.762 M( p' K$ B% X& i4 m0 ~3 M
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.) H/ B3 x8 G4 ~9 [: a
/ [+ ?4 y& p4 \9 o# DI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |