That is a very simple mathematics question.) ^" S0 F# h' ]# \& G4 C
Let x = Male, y = Female, z = Child
: d' t( u0 m; G( z$ x6 i/ f+ Z5.39.217.766x + 3y + z/2 = 100 Formula 1公仔箱論壇: [/ e" r2 f( P- V$ l) {! P1 E
x + y + z = 100 Formula 2
+ X. I9 x' _ z, Y; N1 @tvb now,tvbnow,bttvbSimplify Formula 2 into z, we get z = 100 - x - y Formula 3# h: S; i- G8 K7 q& k3 P, t# j1 K
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4TVBNOW 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。3 S% c; `8 N- O2 J1 W- D i
Formula 4 can change into 11x + 5y = 100 Formula 5
+ `3 X; `1 L- w: _5 S# t6 P' BTVBNOW 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。In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.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。9 y0 E# L7 O9 u( A' F; l
And 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.
6 t( A' G1 X+ [1 Z" p公仔箱論壇Eventually, the answer is 20 female and 80 children and no male. |