原帖由 prozzy 於 2007-5-18 23:05 發表。 
4 G' ^+ @8 o! D: m) D) bthe answer is -$97 for sure.
) p: m U9 [' dtvb now,tvbnow,bttvbThink about it this way 5 c; t, f3 u) W1 p1 H
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
" y: V* w& h5 }( k! T! I2 y2) Now, the owner discovered that the 100 bucks is fake. You can th ... , ` @+ b$ D8 M. g
l& M( B( o+ ]! }. 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。 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; f+ ?4 l$ g2 |5 P5 G% y; z* b" a
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong) I, s6 F7 P9 Z( Z
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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. p; [- q4 |) H. I4 s8 d2 T
, Q, {: }3 {/ R9 C6 v6 |os.tvboxnow.comI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |