That is a very simple mathematics question.tvb now,tvbnow,bttvb# D: S: m7 B' z& T, Q6 R) C- j
Let x = Male, y = Female, z = Childwww2.tvboxnow.com+ y/ Q+ d @/ w3 Y( k' x
6x + 3y + z/2 = 100 Formula 1
. H0 d4 j r8 G& f% w$ k u! ex + y + z = 100 Formula 2
& m, y/ U8 z4 \9 x7 Z$ O- w; n3 L$ F公仔箱論壇Simplify Formula 2 into z, we get z = 100 - x - y Formula 36 U0 X. g, j3 F" |4 G! L2 Y
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4TVBNOW 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。7 d0 ^5 w# O% E2 T, q' S
Formula 4 can change into 11x + 5y = 100 Formula 5tvb now,tvbnow,bttvb- u: H, [5 ^" B
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.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。: q: y4 L% [- i1 _$ r" S, Q. i
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.tvb now,tvbnow,bttvb4 w i$ m% P: U! E& V1 K5 D- W7 S
Eventually, the answer is 20 female and 80 children and no male. |