That is a very simple mathematics question.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。/ e6 y# D+ a' @
Let x = Male, y = Female, z = Child
8 F; l7 h3 e v7 l6x + 3y + z/2 = 100 Formula 1
7 h% Y: z* T4 x: s# [5.39.217.77x + y + z = 100 Formula 2公仔箱論壇3 V- K+ D6 z" d, ]
Simplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.77, x6 W. _( f2 T: l4 W
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb4 \: I n: s2 t. B! O2 U
Formula 4 can change into 11x + 5y = 100 Formula 5
( r/ ~0 ]6 }: @. ^( X- x( iIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
+ {3 P, L; w2 z) ?+ d8 F7 b2 n5.39.217.77And 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.
) D2 t, T2 A( ?Eventually, the answer is 20 female and 80 children and no male. |