原帖由 prozzy 於 2007-5-18 23:05 發表。 os.tvboxnow.com. t4 A9 z. Z; [1 }7 B4 A1 h9 _9 _0 u' S
the answer is -$97 for sure. 1 k2 x+ u" ~) o/ ^2 X: ^
Think about it this way
9 Q) t& Z% F% Ntvb now,tvbnow,bttvb1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)os.tvboxnow.com Q1 v5 Y1 ?$ K) U+ y) Z) B
2) Now, the owner discovered that the 100 bucks is fake. You can th ... ) K2 F4 G! A% B. X7 H% }* vos.tvboxnow.com
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/ ^4 ^6 e! x6 m1) 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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1 l, m# l2 b9 a6 M# c9 \I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |