原帖由 prozzy 於 2007-5-18 23:05 發表。 ; O- f! @, G: a! D
the answer is -$97 for sure. 5.39.217.768 C9 I8 G7 L- }
Think about it this way . t' }4 ^; a+ Q6 ~$ L$ \+ }) E. a
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
1 |! C4 q; K' a6 B) Z: {9 Stvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ... tvb now,tvbnow,bttvb0 I j, ^& E' [$ x6 n; i
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8 F( V$ F# p, w7 dtvb now,tvbnow,bttvb1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong% ?3 I, X" y# W+ y6 c+ K! P \: m
7 D! }; q. T. |- o3 \1 f: [( I: l5 ^5.39.217.76think 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.; R, _0 }8 p: L
& Y- M& z" R3 ~: `+ {5 V9 hTVBNOW 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. |