the answer is -$97 for sure.
. X4 K& j3 `- _- p, o: a" J* y5.39.217.77Think about it this way
" P$ g* E: [; X3 q1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
" ^+ S* f; ~% |3 G7 `* V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 2007-5-19 03:21 PM
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發表於 2007-5-21 03:49 AM
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