That is a very simple mathematics question.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。2 [! _6 {4 s4 y& a3 ^' m5 a% F& q) e# A
Let x = Male, y = Female, z = Child 2 C" t+ L- G" K+ N- r3 F. m6x + 3y + z/2 = 100 Formula 1 % M: W9 D! S, P9 wx + y + z = 100 Formula 2tvb now,tvbnow,bttvb" K. G/ s& t0 l! A
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 2 Y& G5 h. X/ \7 D4 Z" ~- c ~公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4公仔箱論壇0 u) W3 k" [1 \9 ?6 W! j
Formula 4 can change into 11x + 5y = 100 Formula 55.39.217.764 k* K( }" H( j9 g' W; Z$ t
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. 6 o! B+ o0 ^+ U8 s; B2 o, a; I6 gAnd 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. 0 t9 {* N# a& x6 gtvb now,tvbnow,bttvbEventually, 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" g5 E! Z' e: O, |( j
11X must be 0 or multiple of 5 0 U7 L8 {- `/ d4 Y/ ?, R5.39.217.76that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM