That is a very simple mathematics question.
" J. \9 i; {7 h2 X* F1 p$ M' ]www2.tvboxnow.comLet x = Male, y = Female, z = ChildTVBNOW 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。. h; A- p7 w5 d( Q3 N P
6x + 3y + z/2 = 100 Formula 1- Q* B9 t& ^3 Y' L. p
x + y + z = 100 Formula 2
9 ^" I! Q) R" q+ uSimplify Formula 2 into z, we get z = 100 - x - y Formula 3www2.tvboxnow.com6 F0 f; p% ]2 E! Y. |/ W" l
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb9 D( Y0 ^& ^* G6 v5 [4 I7 A: a
Formula 4 can change into 11x + 5y = 100 Formula 5
: |! h% [/ ~( r( w3 G+ Q/ F- Q" rIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
+ p' \3 R5 N0 c! ?6 IAnd 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.www2.tvboxnow.com/ t- j/ ^% C& ]& Y- W
Eventually, the answer is 20 female and 80 children and no male. |