原帖由 prozzy 於 2007-5-18 23:05 發表。 
& H; R, x. M9 X& k- pTVBNOW 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。the answer is -$97 for sure.
; g& t# C, i4 q4 S; `Think about it this way
+ y$ ?3 w' \, z- P) B* q5 m, ^1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
2 z7 x6 V5 O& k6 t! p% j; f, a! N$ E2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5.39.217.765 {1 k @# q0 I% Z7 V" i
5.39.217.76- M4 }" X* H$ ], C7 B+ @
公仔箱論壇4 S" h7 v: l% V1 E) X
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongTVBNOW 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 o: _( j( t, ]& r' K9 ]6 C4 U
1 q2 v2 E" Y4 I2 d公仔箱論壇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.
. O5 t% }+ b3 u# E" A& I' H0 t1 G3 J, D公仔箱論壇
/ [9 |% n# b! H8 t, @. HTVBNOW 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。I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |