That is a very simple mathematics question.www2.tvboxnow.com# t: Z a- W A& b+ Q9 T% _3 n
Let x = Male, y = Female, z = Child
8 Y" W% ^' S9 ?tvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 1
' w$ w- ~# m. H! I- k9 P公仔箱論壇x + y + z = 100 Formula 2
$ w- {& \! |- W3 \% ^' M4 Mwww2.tvboxnow.comSimplify Formula 2 into z, we get z = 100 - x - y Formula 3, b& v2 p4 a: x3 n5 ~9 e' f
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb n% s: T& @: d5 ^) ]
Formula 4 can change into 11x + 5y = 100 Formula 5www2.tvboxnow.com5 w9 o# V8 W# V( Z( e5 B. |* p
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。/ ?# q/ d. P2 r3 b7 d& n) X7 y5 k
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.公仔箱論壇" `, N' F1 Y; u) D( F
Eventually, the answer is 20 female and 80 children and no male. |