原帖由 prozzy 於 2007-5-18 23:05 發表。 
% x: Q/ W# a- G9 {" i& X7 t) W公仔箱論壇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。# z- L# Z; q7 F" Y
Think about it this way : I' ?8 [( i# o# A4 G
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.76: P$ s8 P7 K( @* X! J
2) Now, the owner discovered that the 100 bucks is fake. You can th ... % V; n. Z) @4 r
5 h6 I" V6 C" C$ }. }# S公仔箱論壇 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。3 l2 V4 w+ Z) e/ n6 E# u- r
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongtvb now,tvbnow,bttvb- z7 Z, T+ a X4 J
tvb now,tvbnow,bttvb: x c2 E: P: l- `, }& R) u
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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, G0 h. l6 o9 \5 s9 i! u5.39.217.76I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |