原帖由 prozzy 於 2007-5-18 23:05 發表。 3 _/ r8 _7 n) {: d
the answer is -$97 for sure.
2 ^! X2 H g3 g/ GThink about it this way tvb now,tvbnow,bttvb8 n4 r: |2 D/ y; p! e
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
# q0 g* G" @9 P5 OTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2) Now, the owner discovered that the 100 bucks is fake. You can th ... 7 j: t2 h" U/ R1 R* `8 r4 J公仔箱論壇
4 G- C: j' n' K1 J8 I% Dtvb now,tvbnow,bttvb tvb now,tvbnow,bttvb; m( ]" Q5 Y5 y4 y. N4 Z/ Y
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong: l+ c: j! n4 Y* P+ m0 H8 ~, Q" d
5.39.217.77$ i2 S; m8 Y# X
think 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.5.39.217.773 Q2 J: |+ E1 p3 D* H
* [4 @8 c0 W/ Y/ q/ o' v( C' x5.39.217.77I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |