That is a very simple mathematics question. ( _' U( L1 ~& o0 _" R/ I. t+ U; c4 s公仔箱論壇Let x = Male, y = Female, z = Child . U# g0 v- }* J, wTVBNOW 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 ( i& Y2 R, u' n) ]% ^% T! U8 J: jtvb now,tvbnow,bttvbx + y + z = 100 Formula 2 * u6 W2 {: Q7 r6 ]+ e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。4 G# L/ d; k* e/ L) g5 _0 B
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4TVBNOW 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。9 t/ f/ _8 S8 w# u, M
Formula 4 can change into 11x + 5y = 100 Formula 5 6 P9 _+ H/ q: [4 ]- R( z( ^# Btvboxnow.comIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. 4 T& I* \1 v7 [: Z; o9 F; `& ]tvboxnow.comAnd 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.公仔箱論壇4 j% l t* ~# X, l5 K% u9 b; ^
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