That is a very simple mathematics question.
0 p* \, T' c1 STVBNOW 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。Let x = Male, y = Female, z = Child
% k" |; U! I' ^, d. [$ B公仔箱論壇6x + 3y + z/2 = 100 Formula 1
4 v& Q: B7 R# 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。x + y + z = 100 Formula 28 c. U4 i( b6 C) l( g
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
4 } c3 c3 M. X- w9 x8 B+ k, q4 ?. XSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4公仔箱論壇+ h) u) p0 J3 N* j" m" l
Formula 4 can change into 11x + 5y = 100 Formula 5公仔箱論壇( k1 _7 i8 U$ ?( |5 s( f* E8 w% r0 _
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
+ W8 ?- @! Q% c3 _$ D/ s5 t0 M) _5.39.217.77:8898And 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.
3 N* A) r" N2 B- i4 Q% w% XEventually, the answer is 20 female and 80 children and no male. |