原帖由 prozzy 於 2007-5-18 23:05 發表。 www3.tvboxnow.com: B$ h4 J: Z0 X. ]7 Q6 K
the answer is -$97 for sure. www3.tvboxnow.com) a7 g) i E: b' l+ n, |7 Z
Think about it this way
0 {: E1 ^7 W) r1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
7 q A6 n6 h% d1 PTVBNOW 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。2) Now, the owner discovered that the 100 bucks is fake. You can th ... " i; _. {, h! R/ F2 t8 a, r X
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0 _4 t( E4 C2 {5 g4 h7 ?% H' GTVBNOW 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) 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 $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.tvb now,tvbnow,bttvb: g c" D; a" H2 H
+ `4 l$ L' c, Etvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |