原帖由 prozzy 於 2007-5-18 23:05 發表。 
) V* \3 l* W4 i+ ?4 t+ }0 `/ Ytvb now,tvbnow,bttvbthe answer is -$97 for sure. 4 K7 L% Q0 F/ H, w
Think about it this way
; d. a2 R" V3 }: I5 |- c# C5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。; M; \! X5 V! e
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5 `5 k& P' l: z$ B
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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
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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.tvb now,tvbnow,bttvb) W: D6 w" v1 x4 J
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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. |