原帖由 prozzy 於 2007-5-18 23:05 發表。 
' i! a6 b' Y, }2 ?4 b2 }5 a2 Vtvb now,tvbnow,bttvbthe answer is -$97 for sure. 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。/ M! P: z5 R' `/ O7 ]: V3 `* t1 N
Think about it this way 公仔箱論壇# z, x8 W) z2 U8 T: z
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
" k6 n0 Q" j& `0 X' f5 m# A2) Now, the owner discovered that the 100 bucks is fake. You can th ... , o8 n) w( P" k* u" F+ Jtvb now,tvbnow,bttvb5.39.217.76, b4 `. K/ i% @
9 f; Z/ P6 {2 h( o/ x j9 j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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, Q! ]* O9 y. E5.39.217.76think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.tvb now,tvbnow,bttvb+ B5 L2 K/ K) J7 @% k1 W" _
3 U+ F! R: C2 `+ Z$ H% I公仔箱論壇I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |