That is a very simple mathematics question.
8 r! J# m' z1 v( _( l: t% nTVBNOW 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。Let x = Male, y = Female, z = Child5.39.217.76, S/ g2 s8 m1 ?% }0 A5 v
6x + 3y + z/2 = 100 Formula 1
# o2 R- Y8 p3 ~) m+ ?公仔箱論壇x + y + z = 100 Formula 25.39.217.76* T4 |9 h& D% P9 \3 R
Simplify 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。) [0 C5 W5 f4 @5 ]7 A5 A
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4TVBNOW 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。$ ]! r! n' | ^: f w' A
Formula 4 can change into 11x + 5y = 100 Formula 5- e9 S& L) w; O7 x4 k5 u1 p0 T
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
2 H2 V: \' D6 ?+ f! S' A5.39.217.76And 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.公仔箱論壇: x6 e' [/ ]$ h. k. I L
Eventually, the answer is 20 female and 80 children and no male. |