That is a very simple mathematics question. 8 O0 Q% V* m5 \/ oLet x = Male, y = Female, z = Child " u; v* q5 E. C$ Z8 \tvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 1TVBNOW 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: i0 y* b. e9 v1 y: L
x + y + z = 100 Formula 2 5 C+ v" h5 W7 T1 Z* v1 C/ B5.39.217.76Simplify Formula 2 into z, we get z = 100 - x - y Formula 3+ I* f6 A' b+ d% M. y; _+ j
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 ; ]. C# u; a$ }/ B Z g( S* c) z5.39.217.76Formula 4 can change into 11x + 5y = 100 Formula 5% Z9 U* u! i7 p; l) _- r
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.5.39.217.767 P2 g( Z7 \ t5 K0 ~2 H
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 = 80.5.39.217.76+ z D; w+ `6 U% ^" {) u4 _
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,children5.39.217.76) E: N' |/ s8 ~3 Q1 o; ]0 c
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 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。; d1 s8 b' S! p: b+ h
11x + 5y = 100 Formula 5
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11X must be 0 or multiple of 5( K4 |2 X$ w1 t8 j
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。6 O: _) F0 S+ a1 q) B9 H. o
5 male 4 T2 I% J2 W' w8 ^6 n3 z公仔箱論壇9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM