That is a very simple mathematics question. {: ^4 W( q N+ |; a公仔箱論壇Let x = Male, y = Female, z = Child 0 v0 W! U! F# ~1 i# w5 K: uTVBNOW 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 " p+ H# \# I% U( iTVBNOW 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。x + y + z = 100 Formula 2 ( M/ ` R% {0 p. J- JSimplify Formula 2 into z, we get z = 100 - x - y Formula 3 7 ^; A) h6 y9 l; iSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 6 s4 S) f) F3 l$ ~8 VFormula 4 can change into 11x + 5y = 100 Formula 5 ! H/ j" P$ v9 n9 a9 ^; F" j; aIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.5.39.217.76$ |$ V/ |) a) 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.tvb now,tvbnow,bttvb; t. F2 D" V" G( k
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
原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 3 K( c' k9 c) |0 g0 r3 z
11x + 5y = 100 Formula 5
. \5 ?! N' ^' }: m: t" ?5.39.217.7611X must be 0 or multiple of 5 ' L A2 m5 I" [4 b7 ]1 _6 y' Ctvb now,tvbnow,bttvbthat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children % `' u9 Y: a. Q2 p, 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。5 male / Q( o9 O5 s* {tvb now,tvbnow,bttvb9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM