原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb1 N( l; l! Y2 F) o$ @' T. s
the answer is -$97 for sure.
9 A& I- |) t+ |& F qThink about it this way 5.39.217.76; b Q* p, S2 q5 W
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。' T. c& V5 [5 H% q/ o `
2) Now, the owner discovered that the 100 bucks is fake. You can th ... + T; S4 x8 ?- x$ U% ^/ r# T4 S. ?tvb now,tvbnow,bttvb- [ d; O; N1 G3 r1 p4 X
5.39.217.764 b7 L7 S0 o9 x$ x; ~ `7 m
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong7 d) P* ` i; C8 v. Y
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。. R! y/ G N7 {- f
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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) U6 S+ C. ]" t2 x# Itvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |