原帖由 prozzy 於 2007-5-18 23:05 發表。 www3.tvboxnow.com4 F+ U# h/ a1 X* B( I
the answer is -$97 for sure.
9 l$ @& |) W9 c/ u" s9 _) E公仔箱論壇Think about it this way 公仔箱論壇( i4 V. U& r) u G; m3 K4 h4 n$ K) M! R
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)( [; o1 ~* S# D# x/ z- A8 r4 x0 ?
2) Now, the owner discovered that the 100 bucks is fake. You can th ... ( t! Q' f* A: ^6 X8 Y公仔箱論壇
$ g; A9 Z; X' Btvb now,tvbnow,bttvb % G) |2 ^. V, V; [2 R
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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think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.- e/ |8 y4 e r f9 R9 c
& q. S1 ~: G `% _( G$ GTVBNOW 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。I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |