That is a very simple mathematics question.公仔箱論壇; b4 B8 n9 K7 t" _1 ?. l: E
Let x = Male, y = Female, z = Child公仔箱論壇$ @# J1 D7 O1 c
6x + 3y + z/2 = 100 Formula 15.39.217.76& c) L. J8 {: x$ {
x + y + z = 100 Formula 2 0 g9 E6 @+ a" L3 ?$ Y公仔箱論壇Simplify Formula 2 into z, we get z = 100 - x - y Formula 3TVBNOW 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。5 c: [3 R9 ]/ w r* Q$ N1 Y; w+ I
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4% [1 r' ]4 ~: K2 J! w" U$ ?& U
Formula 4 can change into 11x + 5y = 100 Formula 55.39.217.76+ i: C( t2 z7 e$ c7 t
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. $ f M. R' n j$ b6 |; D3 o7 M/ HAnd 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. 0 d3 @8 h& X( M; mEventually, 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) D4 E4 h* ~& Z: d. C; y8 G8 A' d/ \
0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
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11X must be 0 or multiple of 5公仔箱論壇2 r6 |+ v/ Y i! {5 m* ^; M* e
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM