That is a very simple mathematics question.
$ \$ }% h; Q. L4 r/ \- ^% X! R5.39.217.76Let x = Male, y = Female, z = Child2 I8 c2 `: y( |. h3 u- g" r
6x + 3y + z/2 = 100 Formula 15.39.217.76& }4 s+ H/ W+ ?) L$ C3 p( B" R8 _5 N
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。* ~' u% C K3 q$ ^" e, n. k! [* T
Simplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.76" t' u* w/ X( B' A/ h1 ]7 L# n
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
& n7 ^; z; W# f" ]+ ^8 ]* K公仔箱論壇Formula 4 can change into 11x + 5y = 100 Formula 5
0 k. L; A% I. M6 j' l& IIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.5.39.217.76+ z4 y3 o _; |" X4 E; {
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.
' K6 z/ ^! E1 E" [4 I2 | Htvb now,tvbnow,bttvbEventually, the answer is 20 female and 80 children and no male. |