That is a very simple mathematics question.
n5 _& Z- y0 P# Jtvb now,tvbnow,bttvbLet x = Male, y = Female, z = Child
$ u# o: l$ h& x- ]tvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 1公仔箱論壇! p% A# I! u) V" A/ M
x + y + z = 100 Formula 2tvb now,tvbnow,bttvb5 O+ ^* O8 {2 ^
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3# F K6 o A% N6 J; G( r: o
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
( ], g7 D+ h a9 H3 Y. WTVBNOW 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- f, z, f' W5 H* F6 e8 I
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.公仔箱論壇# w |8 @* v( _! Y4 B/ B8 a; {
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 = 80.4 T) X& i+ q+ F. b( W$ c
Eventually, the answer is 20 female and 80 children and no male. |