the answer is -$97 for sure.
3 @ }) c* E7 g" v* ^" D2 Ptvb now,tvbnow,bttvbThink about it this way 5.39.217.77:8898( K4 o4 Q- ^9 I( g, M+ L( l7 L0 a
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
! \" h: g$ n9 G. A2) 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 |