原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb/ y: ]$ Y; A, A; ]6 S8 t1 x& D
the answer is -$97 for sure. tvb now,tvbnow,bttvb ?: r2 t v* Y
Think about it this way
& \" l3 z7 A/ G8 ^tvb now,tvbnow,bttvb1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
. \: o, |0 l" z$ k! L公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ... 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。 [* X9 U2 W! i( w
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G+ n% ]% x, ^' v6 A$ Y4 ]2 z' k1 }, f公仔箱論壇1) 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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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.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。% C4 G7 ^9 k0 N1 r) v8 t! @
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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. |