That is a very simple mathematics question. / j: O) Z: |1 ~# C6 W; {tvb now,tvbnow,bttvbLet x = Male, y = Female, z = Child : Q O- }- `' n) X6x + 3y + z/2 = 100 Formula 1 9 v. @) R- \. j5 F+ F5 W) Ntvb now,tvbnow,bttvbx + y + z = 100 Formula 2 : Y$ a2 x* i: W& x P" itvb now,tvbnow,bttvbSimplify Formula 2 into z, we get z = 100 - x - y Formula 3 * F3 I2 y0 R' @6 `Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 ! A2 r1 `7 }( \! e( E7 {. {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。Formula 4 can change into 11x + 5y = 100 Formula 5 / q& a% v3 \0 V* BTVBNOW 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。In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb& k2 L5 v6 [! B" f6 j/ l& s
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. ) f3 a5 p: a( p* pEventually, 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
公仔箱論壇8 L0 ?8 J* I2 a( J2 H/ j
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。" c' }" u* I7 c9 f8 n1 q. {. n
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children 9 e3 L+ l/ B, PTVBNOW 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 3 e% U3 c' c8 | m
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM