That is a very simple mathematics question.
+ @/ P& h# f0 D, l$ stvb now,tvbnow,bttvbLet x = Male, y = Female, z = Child
2 e, y# ]' Z5 B$ V/ h$ c4 zTVBNOW 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。6x + 3y + z/2 = 100 Formula 1公仔箱論壇/ A4 r: ~+ Q+ U$ n. E
x + y + z = 100 Formula 2TVBNOW 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。; ]' c% h5 `7 p1 f' ]$ F
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvboxnow.com" f" s8 G/ M. F* h% ]
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
% N$ g; O0 T0 Ctvboxnow.comFormula 4 can change into 11x + 5y = 100 Formula 5公仔箱論壇* i' G! S; J4 G$ t9 [. a
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
* ?& F6 @ y9 G+ E1 e* m0 D, ctvboxnow.comAnd between 0 and 9, only 0 can give me a single number of y. So, x has to be 0 and y have to be 20. Then put x and y back to formula 1, we get z = 80.
9 Z0 \ W; e u6 hEventually, the answer is 20 female and 80 children and no male. |
發表於 2007-10-13 05:08 PM
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