the answer is -$97 for sure. www2.tvboxnow.com+ q4 N6 l8 L8 ^- Z0 t7 T
Think about it this way J5 z. M$ @ U) Y W/ v8 E. P
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。5 `# z) E3 m) H) q; g7 E9 i/ S
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
| 
發表於 2007-5-19 03:21 PM
| 
發表於 2007-5-21 03:49 AM
| 