the answer is -$97 for sure.
* h- {5 }+ o' ?6 g: JThink about it this way 公仔箱論壇4 h6 f( ]; y5 S. v
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)tvboxnow.com4 E& J y" p: l. Y
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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