原帖由 prozzy 於 2007-5-18 23:05 發表。 
4 }- \6 l9 K! o5 p, w ^8 E7 N- ~tvb now,tvbnow,bttvbthe answer is -$97 for sure. 公仔箱論壇& g* _2 X: t( b9 l( a6 V {6 s
Think about it this way
! T) L+ y) P& z, B公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)公仔箱論壇8 h+ v( {7 e- V* D# m
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
" E* n+ r7 g" u) @, h公仔箱論壇 5.39.217.778 L: Y) p7 O; a8 `. Z& r3 G% r
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
" D% t8 o% B( n9 A& R/ ~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。 公仔箱論壇- h! ~! ], E3 S4 s
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.
0 z- V/ e6 X1 o( _; JTVBNOW 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。 公仔箱論壇4 i6 P% W. G3 b: z5 f
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |
發表於 2007-7-10 05:18 PM
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發表於 2007-7-11 03:19 PM
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