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。4 D. K( ~; n. s9 b
Let x = Male, y = Female, z = Child
9 F8 d3 Y$ ]- H- q2 D: z& Gtvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 1TVBNOW 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。" H1 v9 u/ f5 d) f, h- I6 E
x + y + z = 100 Formula 2
* T: J/ `; E2 }& D" R5.39.217.77Simplify Formula 2 into z, we get z = 100 - x - y Formula 3+ a) y6 V6 a4 r8 C
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
) k0 D4 V1 X+ ]3 fTVBNOW 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。Formula 4 can change into 11x + 5y = 100 Formula 5tvb now,tvbnow,bttvb# |% {' @, E. C g' X
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
" l% e4 c9 r2 f' MTVBNOW 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.
6 v' s6 z4 c* O9 {3 _8 ctvb now,tvbnow,bttvbEventually, the answer is 20 female and 80 children and no male. |