the answer is -$97 for sure. 5.39.217.76- m; n _& @4 w# }7 W& g
Think about it this way / ]& P0 I$ ], c& {
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)4 V1 o, G! f0 h1 T6 q
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 2007-5-19 03:21 PM
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發表於 2007-5-21 03:49 AM
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