That is a very simple mathematics question.
4 o; Y9 N4 w3 K% G$ Y$ w4 K公仔箱論壇Let x = Male, y = Female, z = Child
4 }& {# u4 U7 y: `+ C+ QTVBNOW 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
% }0 E$ k4 U- \$ B9 d( m/ l- K. UTVBNOW 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 2tvb now,tvbnow,bttvb3 {9 ~/ [) X/ D" |" Y
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3公仔箱論壇+ P/ @1 L$ H& A& H; h
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4www.tvboxnow.com v; @/ m- y! S' L" I# s; V' q
Formula 4 can change into 11x + 5y = 100 Formula 5: O( u) h* ~! C5 `; r4 x; P0 S6 o& S
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
5 c1 n4 P1 k6 q4 UTVBNOW 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。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.
) `* u* _3 `! _! \. ^- P) mEventually, the answer is 20 female and 80 children and no male. |