That is a very simple mathematics question.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。( @6 Q% J. k6 e; ^* _
Let x = Male, y = Female, z = Child
( e; {7 q, ~) R2 e1 Q- Uwww2.tvboxnow.com6x + 3y + z/2 = 100 Formula 1
' T: M+ t; b8 \* KTVBNOW 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。x + y + z = 100 Formula 2www2.tvboxnow.com7 `, T1 j+ T* N" @6 i$ w- ?' d& A
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb7 }4 S4 e- n& _$ M) b6 Y) Q& g
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb& \ s$ U4 `: i- G1 b
Formula 4 can change into 11x + 5y = 100 Formula 5
* v! R& A7 e& M9 ~+ Twww2.tvboxnow.comIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.www2.tvboxnow.com; W6 O m. Q! k0 r9 O' e
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.tvb now,tvbnow,bttvb! e! {- A% i4 Q+ H, k
Eventually, the answer is 20 female and 80 children and no male. |