原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb, D: p# s' {5 L1 w9 o! r8 ]4 e
the answer is -$97 for sure.
1 s( n9 D b3 \1 L; d. Z/ M) B. ? JThink about it this way 公仔箱論壇2 R- p. V7 ?. R: L5 }
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)* z9 P. x d8 ]& X
2) Now, the owner discovered that the 100 bucks is fake. You can th ... % r C& O# L! H' b% X/ G0 ]5.39.217.76( B$ [; Z+ [6 f
5 l3 Q/ z9 U# g+ o0 V; o7 Mtvb now,tvbnow,bttvb1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong公仔箱論壇7 ?! ]7 x3 k# t1 q! _8 o
% N3 s# }5 D f* o, }tvb now,tvbnow,bttvbthink about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
* E1 D1 b* w: Y8 g" V5.39.217.76 tvb now,tvbnow,bttvb5 n' W) b W* [% y H0 Q" _6 f N" _
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |