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。" ]. ^5 ~* w& j# g! y% K6 F7 C) T
Let x = Male, y = Female, z = Child
1 X; D8 C% M, U, u' Y: Z! }* W/ Twww2.tvboxnow.com6x + 3y + z/2 = 100 Formula 1
{' ~* Y- Z3 R% E+ Nwww2.tvboxnow.comx + y + z = 100 Formula 2www2.tvboxnow.com4 n- J9 V" R7 P
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
% D4 O! ~- j# c* ySub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4) ^# c% n. y& P' @: Y8 a G
Formula 4 can change into 11x + 5y = 100 Formula 5www2.tvboxnow.com* p5 r( i! I9 F1 x X. T1 C, s* o
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
% Q t$ a7 Q( A% s& \& ?& n4 hTVBNOW 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。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.
# c7 T _. X/ O" BEventually, the answer is 20 female and 80 children and no male. |