原帖由 prozzy 於 2007-5-18 23:05 發表。  tvb now,tvbnow,bttvb! V6 r' f! q8 s& N# b1 b
the answer is -$97 for sure.
" X* ^$ v! P/ W' W4 {7 WThink about it this way
! a/ `; Z5 K( O5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.76. D7 l! A2 H* t6 t" w$ h8 p
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
6 e B8 C9 y2 z% C. A1) 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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) f5 ^# l z- N9 ~/ NI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |
發表於 2007-7-10 05:18 PM
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發表於 2007-7-11 03:19 PM
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