the answer is -$97 for sure.
# C& A) v4 J5 o& Y& f! ]/ _www3.tvboxnow.comThink about it this way 8 L0 _4 Q- m" h; A/ L$ ?) l7 x3 \
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
$ C+ _) y+ k% Q0 ?/ ~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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