原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb9 t7 @. @+ j4 k7 J
the answer is -$97 for sure. 5.39.217.764 ~7 ]- y3 I& T3 l
Think about it this way
8 O: Q, U$ _& a. |$ E Dtvb now,tvbnow,bttvb1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
! e( z+ G' V% ?2 `8 f0 t& f( ~" ~3 J* x5.39.217.762) Now, the owner discovered that the 100 bucks is fake. You can th ... ~; K) [1 e5 ETVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。
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. T ` y/ d v4 `+ {1 \ X8 A& R$ ]2 l8 N5.39.217.761) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong" [1 j9 p1 W$ u$ t
K# P8 l! d# h. h: y/ Rthink 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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) H4 u& {6 n! y. T* R/ @0 Y5.39.217.76I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |