That is a very simple mathematics question.6 k+ Y# U) ^5 C' X; M& U, v
Let x = Male, y = Female, z = Child
Q& r7 X$ i7 s5.39.217.776x + 3y + z/2 = 100 Formula 14 k2 l* Z& B) j( p/ [& `
x + y + z = 100 Formula 2
' _4 V! w4 ~$ W) Q. q+ c7 K公仔箱論壇Simplify 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。; ~4 a3 w/ X+ s0 _4 Z$ T7 l
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
# X' G' m' U4 K( q% ~+ U6 P. NFormula 4 can change into 11x + 5y = 100 Formula 5
; ]% x$ E( _# M/ X6 z$ rTVBNOW 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.tvb now,tvbnow,bttvb! P- b! @& y' B3 ]
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.
4 @! [* A5 o' T/ nEventually, the answer is 20 female and 80 children and no male. |