the answer is -$97 for sure.
0 R6 G/ G- R! c0 |8 T2 [8 I( H- @9 Otvb now,tvbnow,bttvbThink about it this way 公仔箱論壇' q% Y l! R, V" d9 q4 R; D' \& {
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
3 Y* {' o& i7 {* w$ v3 n5.39.217.762) 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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