原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb( g2 f/ _ y1 @5 y2 O
the answer is -$97 for sure.
- N }8 f( \- M1 c* cThink about it this way
6 s$ j2 G% b; o# D! a1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
+ B$ Z3 l( @4 b4 ~4 R. x) _' F$ x5.39.217.762) Now, the owner discovered that the 100 bucks is fake. You can th ... . W: W; M5 e: s( X S公仔箱論壇: Z7 [$ W, m$ _8 ]1 h+ I& n
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。3 _2 Z/ n. D1 J) U2 r, l
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
9 j# B" K. X- j5 \2 `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。 ) ^. R" h7 q5 R* v: M* O
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.
! ?" Z% N+ {# d% V% s2 ^公仔箱論壇
/ D; Q! ~ q1 h( j5 ttvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |