原帖由 prozzy 於 2007-5-18 23:05 發表。 
5 S1 W) G% `9 a. Itvb now,tvbnow,bttvbthe answer is -$97 for sure. 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。# u; G) J4 F9 r1 }9 v
Think about it this way
6 r3 e4 O& N0 h9 j2 G" [5 f, {1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
! @* D2 ]; z* t: _' Q% e4 O5.39.217.77:88982) Now, the owner discovered that the 100 bucks is fake. You can th ... : ~7 c' b5 R. }9 O5.39.217.77:8898tvb now,tvbnow,bttvb9 t1 ]( x# M: N+ w7 \/ W
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong5.39.217.77:8898( K0 l, V- u& I$ Y
* q- i. K8 B! H+ yTVBNOW 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。think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
8 ?1 q$ g- m2 STVBNOW 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. I: C* P6 c: e; i
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |