the answer is -$97 for sure.
( l, J6 L3 I4 ^8 x4 i2 K: F9 w公仔箱論壇Think about it this way
$ M/ Z/ d" m7 ~2 Y. D5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
5 ^! d8 v( T4 A$ \7 X9 e2) 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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