原帖由 prozzy 於 2007-5-18 23:05 發表。  tvb now,tvbnow,bttvb8 `% p2 d1 J9 G
the answer is -$97 for sure. 公仔箱論壇' M1 O6 t' u7 e4 h
Think about it this way
- ^4 I! Z/ F. o; X: G% q2 u公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18): q* Q* M8 ?' n4 B$ k7 g
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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. R1 m( ^ h2 b g" y' w# [' Y1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
/ b3 G" o3 p1 X7 B2 B3 u 公仔箱論壇" o1 n- x" h- |" I/ m1 f4 Z+ b
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.tvboxnow.com; E/ Q& |2 Q/ K" z" c) s
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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. |
發表於 2007-7-10 05:18 PM
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發表於 2007-7-11 03:19 PM
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