That is a very simple mathematics question.
: J* u0 K/ w' E: O公仔箱論壇Let x = Male, y = Female, z = Child
7 w/ N3 _, p: y" 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。6x + 3y + z/2 = 100 Formula 1; D3 {% |" R0 e6 u; V" P( C
x + y + z = 100 Formula 2
9 p& ?5 r, q7 C5.39.217.76Simplify 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。% [( C, j/ }, `" ]
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
" l( [, S. ]$ w/ eTVBNOW 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! l# Q N9 V( I( F
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
% t& _/ }5 M5 m' W5.39.217.76And 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 = 80.5.39.217.760 U- ]1 f0 K p
Eventually, the answer is 20 female and 80 children and no male. |