That is a very simple mathematics question.4 r& Q& h" m1 D7 ]8 E
Let x = Male, y = Female, z = Child 1 v% I' |$ u6 m |3 m' Y# 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。6x + 3y + z/2 = 100 Formula 1 - L: }; y2 z4 ?1 q公仔箱論壇x + y + z = 100 Formula 2 8 i* k( ~; N4 V8 f( G1 XSimplify Formula 2 into z, we get z = 100 - x - y Formula 3 + h/ B6 f+ R* e. J, N" |5 V! f2 Jtvb now,tvbnow,bttvbSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 45 ~4 W& i3 Y6 z5 |
Formula 4 can change into 11x + 5y = 100 Formula 5tvb now,tvbnow,bttvb7 e( a4 x, j5 ~* ^& k- S
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。+ h+ n+ X& f: ^5 P \
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. % @* t, T! |3 k$ etvb now,tvbnow,bttvbEventually, the answer is 20 female and 80 children and no male.作者: alan1234 時間: 2007-10-14 12:19 AM 標題: two answers
man,female,children + R+ }$ G! j' u: N$ h3 b' U" u9 ]0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 2 c! q, w1 J- _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。11x + 5y = 100 Formula 5
4 s: w1 X: B* L4 ~0 O. n ^tvb now,tvbnow,bttvb11X must be 0 or multiple of 5 ( t' w- ^! \ ?( A, T/ M. Ethat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
