原帖由 prozzy 於 2007-5-18 23:05 發表。 
4 d9 Z D ~6 T4 C D1 O9 oTVBNOW 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. 5.39.217.76; f/ ~. i! l9 c% t% r
Think about it this way
5 c5 ~0 `( b# Z% s% @2 e( Y1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。6 K2 E) o, T4 x2 ]2 \, R
2) Now, the owner discovered that the 100 bucks is fake. You can th ... % q& h3 Y( \+ @# {2 L. j y0 @, O
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
1 @4 z# J1 T7 l8 B, j' ~5.39.217.76 ' O+ @3 f8 F$ C$ G h0 D
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
+ {1 q. G1 x$ P- w$ ^: |; o8 jTVBNOW 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 E" k* ]9 }6 F( y7 @) D/ @) `I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |