the answer is -$97 for sure.
$ H. ~' J2 M9 G8 |; Itvb now,tvbnow,bttvbThink about it this way 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。 I; P5 T& B* M1 _1 t) s
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
- O% R9 L, [! g) A+ _) |+ b) ?7 ~公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can think this as a lost of $100. therefore the overall gain is $3-$100 = -$97 |
發表於 2007-5-16 03:12 AM
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發表於 2007-5-21 03:49 AM
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