That is a very simple mathematics question.
0 k5 o( t6 g% P* p5.39.217.77:8898Let 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。8 ^: }) Q! @4 N
6x + 3y + z/2 = 100 Formula 1
2 j* x/ s" t" g8 q+ y( k% w4 P+ O7 aTVBNOW 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。x + y + z = 100 Formula 2TVBNOW 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。/ c3 k; T% J d2 j; f1 i8 o& C
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
1 f# Y* q: |! |, t* M4 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。Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
" [3 L/ b8 _8 G( M3 tFormula 4 can change into 11x + 5y = 100 Formula 5
# j8 o7 F3 a+ @7 t( ^ z" 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。In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
2 W: u, d% L! O" A6 _/ uAnd 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.
0 J* X+ m) \1 o/ a( K, ~1 F& q( N5 q8 iEventually, the answer is 20 female and 80 children and no male. |