原帖由 prozzy 於 2007-5-18 23:05 發表。 
( `& ^- _6 ?7 H6 a1 b, `5.39.217.76the answer is -$97 for sure. , s* |5 h# r9 G" Z0 V D& B: y6 p2 w
Think about it this way
5 U8 y& w! R% i4 f2 s" n& V2 X q- A1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
; \( u- c- b0 r( q0 x5.39.217.762) Now, the owner discovered that the 100 bucks is fake. You can th ... : |9 T0 g" O0 s( y$ F+ e) L
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。+ V' |& h. i6 |
* E6 t- O7 n. |* r, ?9 E+ `1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
1 g0 W( d4 ^/ r7 r' v5.39.217.76
4 H5 a: z' ?, cthink about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.0 L1 i, v4 b8 X$ Q; x
+ e+ q: i4 v$ v+ c2 _1 A1 X; I公仔箱論壇I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |