原帖由 prozzy 於 2007-5-18 23:05 發表。 5.39.217.77+ n. ?; O& R8 y, V8 V
the answer is -$97 for sure. 5.39.217.77' M5 [) C/ r& h# q5 I7 h
Think about it this way k. y z5 V; C+ l& ?4 a- n
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
. G* w# ^; b5 R: c# g Ftvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ... * j7 \6 c9 \2 q! `( b
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公仔箱論壇1 F+ ^' J; b! Q" g
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。4 w$ d4 }' B \- K$ J
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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.
. I( a/ X, ?; n/ q( v# ETVBNOW 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。
/ j3 T; D4 r. Z0 \/ e2 N: l( eI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |