That is a very simple mathematics question.公仔箱論壇# u5 H0 S4 a4 B, V) v
Let x = Male, y = Female, z = Childtvb now,tvbnow,bttvb c& o( N, t9 ?; _0 g4 T! _* g
6x + 3y + z/2 = 100 Formula 1
5 u7 j! M( L: T& v- h$ _x + y + z = 100 Formula 2
- Y+ n# j. ]9 _9 T" M& J( C: J: T* b& DTVBNOW 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。Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb6 O" J; g. H, W' Q6 Y1 ?( M
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。! Z8 E8 G4 F( }
Formula 4 can change into 11x + 5y = 100 Formula 5TVBNOW 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。) K/ a/ A3 N( f
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
1 q. X. F+ `& {. Q0 K0 g4 K5.39.217.77:8898And 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.
4 K$ p/ r: c8 T( ~8 g8 C' ITVBNOW 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。Eventually, the answer is 20 female and 80 children and no male. |