That is a very simple mathematics question. $ d% Y$ I9 Q4 DLet x = Male, y = Female, z = ChildTVBNOW 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 I" k# h. j) s
6x + 3y + z/2 = 100 Formula 1 9 @: o. k: A4 D/ |$ Lx + y + z = 100 Formula 2 1 f0 l" t# N) S+ r# j8 e5.39.217.76Simplify Formula 2 into z, we get z = 100 - x - y Formula 3TVBNOW 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。1 I- A6 C( ?$ r7 T9 q' O5 K
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 5 Q! H, H# }7 s: jTVBNOW 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。Formula 4 can change into 11x + 5y = 100 Formula 5# [' Y- y" `- D& d8 |5 H
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.9 f# b$ O# L5 o& s5 l/ L" Y7 g l, 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. ' k. U, M/ v$ A" W% EEventually, 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
, O2 \0 E% m4 O7 n+ F/ V, m" O2 u% `5.39.217.7611X must be 0 or multiple of 5% O% x2 ?8 U I( X- b" u S9 P: b
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children / W4 p( Q5 j: }: b; B; ]9 qTVBNOW 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。5 male 5.39.217.76$ ?, W _7 Y' H F
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM