the answer is -$97 for sure. os.tvboxnow.com/ h+ p$ l' N& j% T6 [2 {+ O
Think about it this way
5 C! G. Z r& b: m$ q# W9 t- C+ vos.tvboxnow.com1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
. L. E; ?4 Z! a6 G, v2) 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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