That is a very simple mathematics question. ) u* w) \. ?6 v$ r" aTVBNOW 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 : {/ f3 v' c, h6x + 3y + z/2 = 100 Formula 1 ) t$ G% X" M5 i4 m公仔箱論壇x + y + z = 100 Formula 2" Y2 t, E/ W* ], l( ]+ J5 m/ X$ Y9 ]% t
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3) C5 j7 t/ Q% _
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb1 N, o$ Q$ U! } y
Formula 4 can change into 11x + 5y = 100 Formula 5TVBNOW 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。9 c0 G, y# \$ A' F
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want., e0 l9 g. k8 B- y* Z; x' B' O; S4 L
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. - x( I8 W* B& Q; l0 R- x公仔箱論壇Eventually, 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,children5.39.217.769 _7 m5 ^& w# U9 M E) y4 O
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 % x- ^% l! I |11x + 5y = 100 Formula 5
# O# \3 _0 s7 z6 h公仔箱論壇11X must be 0 or multiple of 5 8 ~6 h# y( q, Bthat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
