原帖由 prozzy 於 2007-5-18 23:05 發表。 www.tvboxnow.com3 i; U& e5 E9 V6 c2 Z
the answer is -$97 for sure. TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。* M' K7 j0 T3 S8 z$ C! T- E4 S
Think about it this way
" i r( g m$ `$ |" f7 Bwww.tvboxnow.com1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
7 Y4 @; W7 q9 A! e: Uwww.tvboxnow.com2) Now, the owner discovered that the 100 bucks is fake. You can th ... www.tvboxnow.com3 A$ O1 \) e, t+ y1 S! e
www.tvboxnow.com4 n; O2 P: B* N0 h: b
/ ^, o ?; p. U公仔箱論壇1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
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think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.6 e3 R5 E8 d7 N$ d
. `8 r# ? Z/ `9 x8 m7 tI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |