That is a very simple mathematics question. 5 h: |' I3 f }/ N3 _: G公仔箱論壇Let x = Male, y = Female, z = Child5.39.217.76' N; B1 r! L2 @0 P
6x + 3y + z/2 = 100 Formula 1tvb now,tvbnow,bttvb1 ]& a7 i( a8 m) a
x + y + z = 100 Formula 2 7 v7 W9 h+ Y; T/ s' ~ h/ k7 `% ptvb now,tvbnow,bttvbSimplify Formula 2 into z, we get z = 100 - x - y Formula 3 / c( Q+ u) ?5 V6 |tvb now,tvbnow,bttvbSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4公仔箱論壇- {6 s# E9 h9 E4 \2 u( |2 g
Formula 4 can change into 11x + 5y = 100 Formula 5公仔箱論壇- n2 @5 ` n" R* q6 a
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. 9 @! Q- K- J( ztvb now,tvbnow,bttvbAnd 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. ( C9 Z6 w& i+ X$ M& _- aEventually, 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
0 q; _5 g4 j1 JTVBNOW 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 must be 0 or multiple of 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。6 f. r4 R: ?) \3 l! v
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children 8 U/ @+ Z. R' g- `1 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。5 male 1 `$ I, }$ r/ S9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM