原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb( c P. i k0 {% C/ y/ n5 y4 H
the answer is -$97 for sure.
, H5 U% E8 {1 m; V7 p1 VTVBNOW 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 this way , T; R9 @7 b2 e/ u; h
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
! X7 |8 l: m9 [4 [; E( f公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ... + S8 x4 }* G- P8 t" B8 A公仔箱論壇$ ?: n5 W- [! J/ O6 {
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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 wrongtvb now,tvbnow,bttvb3 e+ i; ?4 E/ q) H
; M, j! |8 Z( P. ?6 N1 s4 S" 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.tvb now,tvbnow,bttvb( ~* q6 T) L8 t) Z" f
9 e* Z3 t( m) j- f; |& m5.39.217.76I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |