the answer is -$97 for sure.
& K: g' J; _9 a7 P6 uThink about it this way
# }7 M4 L6 r& x4 i1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
" L7 l& t! d! g/ j2) 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 2007-5-19 03:05 PM
| 