That is a very simple mathematics question.tvb now,tvbnow,bttvb1 S& j$ n; D; K& k* _8 N8 g f2 C
Let x = Male, y = Female, z = Childwww3.tvboxnow.com5 {& y. m1 P8 e0 c
6x + 3y + z/2 = 100 Formula 1
2 c% |, ?7 ]- P2 Z; ]; l% [& J' |x + y + z = 100 Formula 2TVBNOW 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。" P; D( ~# `* ]
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3www3.tvboxnow.com& M+ F6 _' Y- R7 {- X" `
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
# Q, V; ^, o! u6 @; m xTVBNOW 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。Formula 4 can change into 11x + 5y = 100 Formula 5
% B6 c# y0 X% B- z: _8 RIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.www3.tvboxnow.com/ ?' ~( D% D: `4 T( ^' x
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.
! H2 z4 Y" \' {5 R, s6 ?www3.tvboxnow.comEventually, the answer is 20 female and 80 children and no male. |