That is a very simple mathematics question.tvb now,tvbnow,bttvb* z: U7 h* [* k k, v5 |" ]
Let x = Male, y = Female, z = Child
' q' @3 a; p; Y" H- E: `6x + 3y + z/2 = 100 Formula 15.39.217.767 c9 p5 f! T5 S- L6 c
x + y + z = 100 Formula 2tvb now,tvbnow,bttvb- J3 U. m# [& E$ P. P
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
; Z# z- q' }" X5.39.217.76Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 40 t$ {1 n5 H# Y( [$ V- z/ j
Formula 4 can change into 11x + 5y = 100 Formula 5tvb now,tvbnow,bttvb; a* p: |) U. M* K
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
~% w0 I, v+ r# Y+ U% PTVBNOW 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 = 80.5.39.217.762 l* s1 V: y1 w$ d
Eventually, the answer is 20 female and 80 children and no male. |