That is a very simple mathematics question.tvb now,tvbnow,bttvb; f% a' G5 r7 j. H0 k$ v( H
Let x = Male, y = Female, z = Childtvb now,tvbnow,bttvb6 L1 X# k& n4 t- ~3 s1 P6 _ D
6x + 3y + z/2 = 100 Formula 15.39.217.77+ ?. q* H6 e+ I$ p
x + y + z = 100 Formula 2% F3 I4 \( F2 F ?# _
Simplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.779 f! c/ K- w' \$ c" T
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
$ P' y& }& A# itvb now,tvbnow,bttvbFormula 4 can change into 11x + 5y = 100 Formula 5
8 C! ^: Z8 G. e/ D& ]+ }: v$ DIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.+ Y" X" \, d4 z1 `' Q
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.
: T0 q$ v) n& c) x9 b, 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。Eventually, the answer is 20 female and 80 children and no male. |