That is a very simple mathematics question.tvb now,tvbnow,bttvb y' _* y4 k* i% i% O( P p; y# n
Let x = Male, y = Female, z = Child % S6 x' o1 j! e4 n0 LTVBNOW 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 15.39.217.771 R! X% `0 d4 I- c+ p4 X( g
x + y + z = 100 Formula 25 U; G3 c) F6 o; [
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 9 K; h p; D% ^% H' C9 E2 dtvb now,tvbnow,bttvbSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4, D: h0 b* G; c
Formula 4 can change into 11x + 5y = 100 Formula 5 2 O; y+ N! F$ A: w4 W& E: I j5.39.217.77In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.5.39.217.77, ]4 D0 d3 u0 a: G8 i) Y8 z4 U. h4 I" _! h
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. ; O: k, {- l8 Q. l: `. M3 X7 _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。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,children 4 a% m1 s( C1 U. v5.39.217.770,20,80 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 {- g v0 j. c) m4 T& x: ^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。11x + 5y = 100 Formula 5
/ j, d% D/ ?6 j" K4 Y- }, b4 x公仔箱論壇11X must be 0 or multiple of 5 ) D: o/ G% u( n& W- U. G公仔箱論壇that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM