That is a very simple mathematics question.
+ r' l1 Z/ U+ T& x2 `5 ftvb now,tvbnow,bttvbLet 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。) N) U9 [9 M. ]
6x + 3y + z/2 = 100 Formula 15.39.217.76! V7 n- i3 O& ~, N. j3 l: G! G
x + y + z = 100 Formula 2
% T/ d" {$ D4 y7 X y. h. ^8 _5.39.217.76Simplify Formula 2 into z, we get z = 100 - x - y Formula 39 q, ]0 H, Z; ~) O/ j" S5 t
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 40 ^' F- C! t1 S) A7 n+ t/ t! H8 Y
Formula 4 can change into 11x + 5y = 100 Formula 5
7 Z# ~6 H: A2 f- a6 @6 m2 Y% dTVBNOW 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.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。1 j' S J7 c6 a2 ^
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.
/ N5 E* ?; ?2 j1 R, y2 \! i+ x公仔箱論壇Eventually, the answer is 20 female and 80 children and no male. |