原帖由 prozzy 於 2007-5-18 23:05 發表。 
7 F2 f' W* t( u+ K: X5.39.217.76the answer is -$97 for sure. TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。9 s1 Q0 q6 |$ ~ D+ U3 k; `7 Q
Think about it this way
& e7 P8 v* A2 g9 S, f1 Q, X" p1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
0 p7 A+ S8 k! V( p0 m" d1 {# xTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2) Now, the owner discovered that the 100 bucks is fake. You can th ... " S, M$ r, ?* k$ n
1 Q$ Z5 L* Y; M- i8 KTVBNOW 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。
/ z# r. ]3 B: ]& p, ~1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong5.39.217.760 P0 [. x8 i# e' Z) V+ J! l
tvb now,tvbnow,bttvb( |7 R/ a; Z, m6 \3 R& ?
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.
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I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |