原帖由 prozzy 於 2007-5-18 23:05 發表。 ; i! G$ |% w2 |" G8 d
the answer is -$97 for sure.
& q& w; A: C+ ~1 G/ FThink about it this way
& e' n, W/ U/ Y: }% v3 n+ yTVBNOW 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。1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
6 T' k+ b9 W! F& x+ g' Itvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ... www2.tvboxnow.com% e# s5 K7 R6 h- C5 x# {
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; d; D2 x( K d$ X' \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.
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# m# |; Q% t, ATVBNOW 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。I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |