原帖由 prozzy 於 2007-5-18 23:05 發表。 
8 [* m' c4 W" J. g( r& ztvb now,tvbnow,bttvbthe answer is -$97 for sure. 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。) R0 h6 c, }- h7 x
Think about it this way
\9 y# z8 U H9 g' T5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
; B" E; T$ Y+ S" }6 r9 Q1 L/ B3 btvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ... ! G8 h f4 l2 z; O3 J. t5.39.217.76tvb now,tvbnow,bttvb, k+ I" s8 E& G- N8 u
5.39.217.763 M( F- U& `+ o$ p. F) ~, _' ]
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong5.39.217.76 y! t; m: I( p/ F1 g4 c
tvb now,tvbnow,bttvb! W# X9 H* m* X$ k# c
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
3 q/ j/ s5 @: w0 W/ htvb now,tvbnow,bttvb 公仔箱論壇' Z) n5 F: E$ E" P/ b4 O2 |9 R
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |