原帖由 prozzy 於 2007-5-18 23:05 發表。 
" t' d/ @) }" i+ O4 Tthe answer is -$97 for sure. ' w- n/ L. ]. D$ G5 u1 J$ Z
Think about it this way
4 g) J' X' z8 P+ x* S5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
" k) O8 q) G& x, X3 x2 I+ {2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5.39.217.762 o+ V: G- J- v! l, T
TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2 u7 f4 _# d% p. z; u/ g* g
TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。* l$ I6 ^. X$ w0 l) v V
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong公仔箱論壇8 W- b: X2 N% c( D. M, S6 q/ G
+ S* A+ W* F2 O6 S5.39.217.76think 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.
4 q3 n Y# H5 f, Ttvb now,tvbnow,bttvb
, g, L) r z: V, Z+ G: y0 HI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |