That is a very simple mathematics question. _% G8 D8 J/ x7 ~9 T Y1 ntvb now,tvbnow,bttvbLet x = Male, y = Female, z = Child I+ a' f8 u# t* W" l% @ {2 s6x + 3y + z/2 = 100 Formula 15 `0 _& b4 b7 b! q4 _& J
x + y + z = 100 Formula 2TVBNOW 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。 Q3 v6 R4 v$ E2 `! ]
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 ! x9 _+ l) ~4 E1 {% \% `% W0 DSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4www1.tvboxnow.com1 P7 O: u' {: w) {# x) `
Formula 4 can change into 11x + 5y = 100 Formula 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。7 K. o- F' O0 j9 v. v& p5 i
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.9 E' t. {* ]" E7 Q( q6 {+ y
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. % p9 g& ]; d$ U/ j' A1 }) O公仔箱論壇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 ) F. o9 a. Y2 m- L+ N公仔箱論壇0,20,80 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 www1.tvboxnow.com% {, S# U* [* F0 v W
11x + 5y = 100 Formula 5
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11X must be 0 or multiple of 5www1.tvboxnow.com2 u: S6 e: }! P) ~: e- p! l
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM