the answer is -$97 for sure. www.tvboxnow.com: ~1 v. o, h# F( K3 o
Think about it this way 公仔箱論壇" _7 A' K6 R/ |( ^7 s
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)www.tvboxnow.com* Y L: ]7 n( s+ k7 T0 I
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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