That is a very simple mathematics question.5.39.217.775 M, I0 p. @; r0 \1 l
Let x = Male, y = Female, z = Child 8 t7 u+ J6 ^8 |, r" s* A6x + 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。' X9 q! `( B: j! k
x + y + z = 100 Formula 27 E* {/ \* F* I/ c2 N
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb, U, d3 N) u( i$ Y
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb2 C9 Q. Y3 D8 o$ {5 q4 t! L
Formula 4 can change into 11x + 5y = 100 Formula 5TVBNOW 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。. i" u+ G6 ], D% ^4 `$ u
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. 0 o9 W \. s x! ]5.39.217.77And 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 = 80.5.39.217.77: G/ h' Y3 E" ^- l% N9 c
Eventually, the answer is 20 female and 80 children and no male.作者: alan1234 時間: 2007-10-14 12:19 AM 標題: two answers