That is a very simple mathematics question.# R8 G' @4 b' n- W7 k4 n7 H% }
Let x = Male, y = Female, z = Child + L$ I+ k" t& {! ?+ B6x + 3y + z/2 = 100 Formula 11 U5 F: D7 G2 c3 d
x + y + z = 100 Formula 2 0 j9 b/ v9 O: p: ?tvb now,tvbnow,bttvbSimplify Formula 2 into z, we get z = 100 - x - y Formula 3 4 R, a( a) b" |: Q$ V公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 7 Z% o2 F) @( {+ P k w AFormula 4 can change into 11x + 5y = 100 Formula 5 ( ]8 {, L) H; t; _) W$ H' L. 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。In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. ) a6 {1 j8 e0 t, V' ]/ ~# n* uAnd 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." W2 z; |$ @2 W5 e5 d/ `) F
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,childrenwww.tvboxnow.com0 c$ |: K2 K9 Q" \& H
0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
, q: b; n: D2 c' h# o5 L! }公仔箱論壇11X must be 0 or multiple of 5公仔箱論壇5 w6 K9 L2 }+ ?0 r( Z! w
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM