That is a very simple mathematics question.
! f/ j9 h O. o6 iTVBNOW 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。Let x = Male, y = Female, z = Child
1 o3 S8 G5 E0 M9 ~tvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 1公仔箱論壇2 J: d; y% l) e- B; j. {8 i
x + y + z = 100 Formula 2公仔箱論壇/ t! P% b: w9 U, z3 L
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
# w" w8 Y6 Z9 [# ]9 o0 mSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
7 P9 U$ e. P B7 ~2 V' \tvb now,tvbnow,bttvbFormula 4 can change into 11x + 5y = 100 Formula 5
6 {' R. l8 f3 k# |% v& p0 U6 C公仔箱論壇In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb5 |7 A. J. {6 e. y, v3 V
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.
) R' j) C7 M! V7 N* s) h1 Wos.tvboxnow.comEventually, the answer is 20 female and 80 children and no male. |