原帖由 prozzy 於 2007-5-18 23:05 發表。 $ O% s! I* Q& k" b H- z
the answer is -$97 for sure. # R1 b* s& F1 C* @! b
Think about it this way os.tvboxnow.com [7 J6 c1 S: G8 x1 k7 X
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
- l% l, t- [: y z$ F3 E9 vtvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ... % p& j; h; y' t# S+ B2 m; m- ]6 G% S5 `. Q
tvb now,tvbnow,bttvb" N0 Z+ ]4 X* d- A, V6 \5 `
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
2 ?2 s6 _/ M5 H& h/ c; g* u- Y/ wtvb now,tvbnow,bttvb 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。. u8 [" D+ t& s; I6 ~8 [
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.
! \6 r# [) h- q; a x# @ ETVBNOW 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。 tvb now,tvbnow,bttvb9 v. K( M) l! b+ v
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |