twinsdragon

That is a very simple mathematics question.
4 z6 o* z; k: E6 Q- p: N) }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。Let x = Male, y = Female, z = Child
3 s& y8 L* m  b& m) z4 q6x + 3y + z/2 = 100   Formula 1
9 g9 T0 k; b7 E. \& E5 |8 S) Mx + y + z = 100    Formula 2公仔箱論壇' ?( U& V/ w/ l7 Q, X1 i
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb, W1 V( X1 K; F1 W9 d# P+ K
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4) w/ g5 X/ f% h
Formula 4 can change into 11x + 5y = 100 Formula 5
: ^) W; N  |  n+ S公仔箱論壇In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
' q, P" O; T5 s3 O. L公仔箱論壇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.
5 ]8 t& @7 ?1 wtvb now,tvbnow,bttvbEventually, the answer is 20 female and 80 children and no male.