原帖由 prozzy 於 2007-5-18 23:05 發表。 
/ u$ X" v% T2 X4 I: E2 {公仔箱論壇the answer is -$97 for sure.
5 a" s3 v& U* y$ aThink about it this way
m( X/ \/ a# C$ s1 {tvb now,tvbnow,bttvb1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
" o, p. t2 C9 O( Ltvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ...
8 ]! S! {9 P( y( p- d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 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- c2 A& w2 o7 }7 x% }* A
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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. |
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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