原帖由 prozzy 於 2007-5-18 23:05 發表。 公仔箱論壇; V/ p. m, [6 u. Z8 X
the answer is -$97 for sure.
" [. d% i" q4 d$ W, n8 u% n: wThink about it this way $ E* K2 e2 P; o3 W- p3 b; V8 k
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
4 X% @# u9 d# L3 R9 ctvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5.39.217.766 `8 q2 Z3 ~# q
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+ b1 x; y: b! l1 w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 wrong6 _5 P& r2 _/ s. f1 M/ i* n. k5 `
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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。1 e% B5 d& b: v. s
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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. |