原帖由 prozzy 於 2007-5-18 23:05 發表。 $ Z! G7 M* `5 t* q
the answer is -$97 for sure.
% J$ h! `; H. L! T; {公仔箱論壇Think about it this way ! @# w- G- c- {; y# ^$ f
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。! |% Q' B/ `* D
2) Now, the owner discovered that the 100 bucks is fake. You can th ... tvb now,tvbnow,bttvb3 F0 j: b+ p+ H, `6 K# J+ M: o
, b) ?; c( A0 U7 U公仔箱論壇 # D# j6 h2 u; y+ D
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
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; U3 J( P( u7 t8 T$ ^, etvb now,tvbnow,bttvbthink 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.! L7 b/ B. W3 D1 ]
公仔箱論壇/ y: ?( n3 S% w, b/ E
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |