原帖由 prozzy 於 2007-5-18 23:05 發表。
0 x5 a( {" g- q& N! p+ ?: [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。: X' G; u& X6 `5 G) L9 t
Think about it this way 公仔箱論壇( F6 K# G/ o9 U+ `- I
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
3 M7 D- @( d, P2) Now, the owner discovered that the 100 bucks is fake. You can th ... $ E' D5 B; D# L7 R1 v$ Z! V公仔箱論壇www3.tvboxnow.com+ M# ]# G* j7 r7 V# X$ e4 R$ \
7 Q+ K. _1 x; A9 T) q% ^1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongwww3.tvboxnow.com4 `5 T5 \ u! h6 L6 b9 e2 q0 U
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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.
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I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |