原帖由 prozzy 於 2007-5-18 23:05 發表。 $ L+ ]$ h5 G7 s# |' u ?$ M- u
the answer is -$97 for sure. tvb now,tvbnow,bttvb/ X1 @5 `) Z; ^$ Y2 ]2 q8 c+ A# C
Think about it this way 公仔箱論壇6 V' j; `: L, N& @& z
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
3 `( D) k9 r; E! RTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2) Now, the owner discovered that the 100 bucks is fake. You can th ... 6 h/ ~ `$ I% n- d% h( o v! j( k
公仔箱論壇5 S- ^5 M. W; H
5.39.217.76; p+ c) c: ?4 }+ g' l& l" Y" b: h
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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* `. N( {% u. z5.39.217.76think 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.
, Y, n% k, M; J- A6 S( Q2 k 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。0 R9 _! } W' J5 G8 J2 x
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |