the answer is -$97 for sure. www3.tvboxnow.com$ o- B; o# H% h
Think about it this way 3 F/ l6 ~4 i+ G" V& Z2 [; T$ n9 g4 k
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)公仔箱論壇' g' }& j4 J$ @, c) b% {7 I- e
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 2007-5-21 03:49 AM
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