That is a very simple mathematics question., G+ e* f& Y8 o# ~* v) V9 N
Let x = Male, y = Female, z = Child # i0 P) h5 a* r$ }" c6 }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。 [8 [9 S( W5 ?$ s# N- V
x + y + z = 100 Formula 2tvb now,tvbnow,bttvb0 S8 t* D/ W/ A) P. b
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 ( N' K9 S; A8 R7 Q% PSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb2 T* J/ K) W& H+ P* c# X4 Q/ v
Formula 4 can change into 11x + 5y = 100 Formula 5* K$ c6 ] T. r7 o: \$ ?
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. 6 V# V2 y) t! Q- R# n& @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.+ m1 H6 `/ p( @- m0 X% u, K- `: 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
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。0 E& V8 R3 y! R* T- M
11X must be 0 or multiple of 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。/ p4 q7 S. x: f. Q9 |
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children5.39.217.76( y2 n B( q4 I
5 male 公仔箱論壇; X+ s8 [% h! _0 W* b" Y/ e
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM