That is a very simple mathematics question. . a# Q: u$ r! Ntvb now,tvbnow,bttvbLet x = Male, y = Female, z = Child / F" B/ X0 t: {) x+ _2 ttvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 1 & ], e; D' _1 E# ]: m8 V% R% b公仔箱論壇x + y + z = 100 Formula 24 ? k0 L. d e3 {& L& x
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb' A5 h w$ `, B& S. K. u
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 ; F6 R# z8 U; q, A$ K ]" a( @, v& ntvb now,tvbnow,bttvbFormula 4 can change into 11x + 5y = 100 Formula 51 K l8 Q8 }+ n- t, D# j! s
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. - u& i4 H7 `. AAnd 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 = 80.5.39.217.76, w- |# ?2 U, N1 n$ @1 p! o K- r" y
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 : S0 j. U5 \/ b1 b6 q5.39.217.760,20,80 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 tvb now,tvbnow,bttvb( h o1 ?% L0 ^) G% ?, i1 H- D D
11x + 5y = 100 Formula 5
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11X must be 0 or multiple of 5 / F8 W# j/ J' ~/ D 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。that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 childrenTVBNOW 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 B) Y* Y4 T, A) N3 t9 n6 E
5 male : [1 z) j/ J1 g8 w5.39.217.769 female作者: dafunhei123 時間: 2007-10-15 10:39 PM