原帖由 prozzy 於 2007-5-18 23:05 發表。 4 o. |% c5 u; q, D5 c4 J
the answer is -$97 for sure. TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。* z6 J8 V ^/ s" b$ m$ O) ^
Think about it this way
, z0 e+ u6 D! l' [* q& t公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)tvb now,tvbnow,bttvb* k$ O `3 U$ w* r7 d$ q" q3 e0 N
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 9 a0 O. [# Q9 P) m9 q2 T+ `! K5 B* Ktvb now,tvbnow,bttvb
# D4 m4 X6 v- x# s5.39.217.76
2 P/ [, z* d+ H* O! `- S1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
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2 p0 T% l* H) V' [$ |4 {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。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.公仔箱論壇0 V' b5 S8 ^2 {: K, }" U. X' m
5.39.217.76! h- U1 J* d. S' N: V) a
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |