That is a very simple mathematics question.3 {4 z d( h0 B: w
Let x = Male, y = Female, z = Child 9 D' a% F+ n. nTVBNOW 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 $ T1 T2 v* ]$ Q9 {8 Q公仔箱論壇x + y + z = 100 Formula 27 A g% W+ O0 M. R
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 5 S% T( z* V( s3 E% v3 G5 m, J6 kSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 4 j9 a3 F7 U# I& \tvb now,tvbnow,bttvbFormula 4 can change into 11x + 5y = 100 Formula 50 j( t% J" L% {( W
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.) c2 C/ Y2 D& E* x' w
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. y. s& D3 P+ \' _) e/ ?- ]! T
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
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。+ S5 [3 ?+ D4 A/ g
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。- b$ E" L Y. m; D
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children2 G' Y( I+ D' U* g0 [
5 male , h! J, x# a' ^9 a, s6 ]公仔箱論壇9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM